Since I agree with Anderson and Girgis' case, I'll focus here on John Corvino's case:
John Corvino presents the best case that I've read for a more restrictive view of religious liberty than currently exists in light of state and federal RFRAs. Yet, for all that, he still fails to provide a convincing case against the arguments of Anderson and Girgis. Anderson and Girgis have a more developed philosophy for freedoms of religion and conscience. The best Corvino can do at times is to try and poke holes in it here and there and present hypothetical scenarios (e.g., Mr. Burqa or Mr. Dawkins-Hitchens) that he hopes the reader will intuitively agree with. That's not to say that Corvino has no philosophy for freedoms of religion and conscience (I address some of that below). And for the large number of people who already share Corvino's moral and political intuitions, presenting such hypothetical scenarios will be more than enough to convince them that religious liberty needs to have more restrictions (e.g., in the form of SOGI laws).
Now let me address some of Corvino's system building and why I don't find it persuasive. In addressing the issue of why we should have religious liberty exemptions Corvino explores four possible reasons: (1) religion is a proxy for deep, important commitments, (2) religious believers find religious claims to be highly binding, (3) religion is a fundamental good, and (4) people have often discriminated against persons on the basis of religion.
Option number three was (and is) my own rationale prior to reading the book. Corvino’s objections to this are twofold: (a) religion can be and has been a force for evil and (b) if we understand the fundamental good of religion to consist in its facilitation of persons grappling with fundamental questions (e.g., the purpose of life) and living in accordance with one’s answers to such questions then religion does not *uniquely* perform this function and so we should not have laws, like RFRAs, that uniquely favor religion.
Although I don’t think objection (a) is convincing (it’s not enough to show that religion has been a force for evil, it needs to be demonstrated that it is just as much a force for evil as good; for, consider that free speech can be and has been a force for evil), I do think it sheds light on the problem of speaking about “religion” in the abstract. The modern liberal tends to view all religions as basically the same and, hence, as equal in value (or equally lacking in value). However, the modern conservative rejects this notion. It is an obvious fact to the majority of conservatives that not all religions are the same and that not all religions have equal value to society. Perhaps speaking about the value of “religion” was easier in the time of America’s founding fathers when their imagination of “religion” could not stray too far from the Judeo-Christian context that they were steeped in. In our contemporary context, in which Scientology, Hinduism, and Islam shape our understanding of the word “religion” just as much as Christianity or Judaism (and especially as Islam struggles internally to find peaceful expressions that can win out over violence), asserting the fundamental good of “religion” is less plausible. Nevertheless, Anderson and Girgis make a convincing case that the sort of integrity one achieves by being able to live according to their conscience (religious or not and true or not) is a good thing that is worth protecting unless there are overriding considerations which they spell out in detail in their chapter.
Concerning objection (b), I do not think that non-religious systems—and especially modern secularism—are capable of providing the necessary foundations for ultimate purpose and perseverance in the pursuit of that purpose. In fact it is not simply that modern secularism fails to provide the necessary foundations for these goods, but that it actually erodes them.
Corvino agrees the most with rationale number 4—especially in the case of systemic discrimination—but has several caveats and notes that other factors besides religion have been and are the basis for discrimination. This serves as a starting point to build his case for why religious discrimination should not be privileged above, say, sexual orientation discrimination. However, I don’t find it convincing since I don’t think our only or even our primary basis for exemption laws or for special protections are whether you or your group is a target of discrimination. Anderson and Girgis ask whether Corvino would be more willing to allow Quakers certain exemptions than evangelicals, given that Quakers have historically been more abused. However, it seems that Corvino would be just as unwilling to grant them something like a RFRA. Part of the problem here is that Corvino's system, what he bothers to flesh out, is so thin. I think we can combine reasons 3 and 4: religious exemption laws make sense because religion (though not broadly defined) is a fundamental good (reason 3) *and* this fundamental good is a basis for discrimination (reason 4). Since sexual orientation can’t make claims to both reasons there is no basis for treating it as equal to religious liberty, under Corvino's scheme.
Even if we just take reason 4 as our basis for exemptions and protections I don’t think this provides an obvious case for those who support SOGI laws and/or oppose RFRAs. Corvino notes that “We’ve moved rapidly… to a time when many people think opposition to homosexuality so obviously wrong as to not merit further inquiry” (p. 96). Corvino then discusses the case of Brendan Eich who was driven out of his job as the CEO of Mozilla because of his support for traditional marriage and notes that this “troubles me, especially as someone old enough to remember when it was very common for people to fear losing jobs on the grounds of being gay or progay” (p. 98). Thus, it is far from obvious that LGBT folks are the subject of more social animus than, say, an Evangelical conservative. Corvino presents some data to suggest that LGBT folk are disenfranchised in society, but I think Anderson and Girgis do a good job debunking parts of it and calling other parts into question. Prior to reading Anderson and Girgis' section I wrote the following: Where is the systematic oppression of LGBT folks? The business sector favors LGBT causes. The judicial branch of gov’t certainly favors LGBT causes. The media industry favors LGBT causes. Virtually all the major academic institutions in higher education and lower education are favorable towards LGBT people and causes. In the executive branch our current president, Trump, is the first president to enter office as supportive of gay marriage and transgender bathroom use. Despite leftist hysteria about Trump being bad for or against LGBT people, Trump has entered office as more pro-LGBT than Obama in his first term! The only place one might argue that a system or institution is against LGBT is the legislative branch with regard to RFRAs… yet this is precisely the point of dispute and, thus, it would be begging the question as to whether this is a form of discrimination.
Corvino favors a particular approach towards balancing religious liberty and equality on the basis that "otherwise few businesses might otherwise serve [LGBT persons]" (p. 88). But this seems detached from reality and Corvino undercuts his own point, I think, when he acknowledges that "diversity and inclusion are good for business" (p. 105). Maybe Corvino would want to say that his two ideas are consistent because he doesn't think many people realize that diversity and inclusion are good for business. But our empirical observations say otherwise: the majority of businesses are pro-LGBT or, at least, do not discriminate. This is precisely why Google, Apple, Microsoft, etc, etc, have been vocal about being pro-LGBT: they recognize the commercial value among the general public. As mentioned above, Corvino does cite a study which found that LGBT people report facing just as much discrimination as racial minorities, but I'm skeptical of self-reports and can point to several instances of fake hate crimes. Our culture has elevated victimhood status to a virtue and, hence, we have many people actually attempting to be victimized (or perceived as such) because it provides them with "intersectional" credibility.