For anybody interested in the life and work of Dietrich Bonhoeffer, "A Testament to Freedom" is an excellent overview.
Dietrich Bonhoeffer was a German theologian and pastor during the 1930s and 1940s. He spent his career fighting a losing battle for the independence of the church and the Gospel from Nazi influence, not the least of which was Bonhoeffer's criticism of anti-semitism. That battle ultimately cost Bonhoeffer his life, as he imprisoned and, finally, executed just days before the end of World War II.
As Europe fell into war, Bonhoeffer decided that he, as a Christian, could not fall back on piety--if a mad man had hold of the wheel of a bus full of chidren, one had to force him from it. No other response would do. Bonhoeffer became part of the conspiracy to kill Hitler, which brought him in league with men of varying religious beliefs (and in the with his brother-in-law, who brought Bonhoeffer into the conspiracy, a man of no belief of all). Bonhoeffer also had to take a government position to play out his role in the conspiracy. This tranished his reputation with many of his old allies -- Bonhoeffer had to be careful about who he could confide with.
Bonhoeffer found himself in a situation where his reading of the Bible, and his understanding of Jesus as a "man for others," gave him a double-life of lying, in a cause to kill a man, where, in short, he had to "sin boldly" and place himself upon God's forgiveness. This was not just an abstract exercise for him. He felt he had to give up everything that is considered "Christian" -- and his reputation, his pacificism, and his own sense of being a good man -- to suffer for and with Christ. Those were not easy steps.
In league with secular men, and opposed by many Christians, Bonhoeffer worked out his final theological proposition: that, biblically understood, Christianity has to be, for people who have come of age in a secular world, a religionless Christianity. This is not an easy concept to grasp, but I believe the crux of it is that Christians must live for, and suffer for, the "least of these:" people who suffer from the immense power of the world, who are genuinely oppressed, who are in pain, who search for meaning and cannot find it. It means that the Church must throw off its privileges, and properties, and wealth, and live in the world with those it would serve. And common cause is found, not in those who can recite the right "holy" words, but with those you find with you as you serve these others.
I certainly am no witness to Bonhoeffer's beliefs. But when I read about his life, and read his words, I think: here is a way out. I grieve for my faith when I see it enlisted for the cause of anti-immigrant, anti-gay, and anti-Muslim bigotry, and when I see it preached by those who boast of their ignorance about the world they live in and their fellow men. Too much Christianty, these days, seems overly concerned with privilege, and with manning the barricades that separates it from what they see as sin.
I'm probably putting words in Bonhoeffer's mouth, but if you want to find your brother or your sister, first look to those you find repugnant, to those with whom you disagree. They, after all, are your mirror image. Start your understanding there. You just might find your way out.