Status Updates From L'Hibiscus pourpre

Kambili's brother and mom, who are both older than her seem to know something about the father that Kambaili herself does not know. After jaja skipped church the father threw a grenade shell at him missing and breaking her mothers figurines. when the mom walked in she didn't seem surprised she just bent down "and started to pick them up with her bare hands" (Adichie 7). Meaning this isn't new to her or the brother.

So far its very obvious that the whole family is scared of the father and his punishments ; "maybe if I talked about how good it tasted, Papa might forget that he had not yet punished Jaja," I can see why the family is scared of the father.

I have a few questions about what exactly is happening with Jaja up to this point. He keeps talking about the wafer and the "priest touching [his] mouth" (Adichie 6). What does Jaja mean by this and why is he afraid of communion?