Your points 1 and 4 are valid but the others read too much in “Eat up, in Africa kids are starving”.
At least my mother never went into detail about why the kids there are starving. She also ignored me saying “well, send it to them then, I don’t want it”.
I’d say most outspoken atheists come from religious families - same as ex-smokers are more vocal/aggressive about smoking than those who never did.