Exactly what the title says, Christianity in all its various strains still stems from the horrendous old testament, and with all the awful shit that endorses, as well as with things like Calvinism and the general doomsday cult foundations in the religion, why do some people still act so charitably towards it? Christianity has proven itself to be a morally corrupt and oppressive institution at every turn. Or maybe I'm just too negative? 
EDIT Ok guys I get it this was rather reductionist, and I definitely was disregarding all the good that religious folks have done, and that religion has inspired people to do, but again over correcting into enthusiastic support for religion can also be problematic.
i'm saying socialism bears the mark of christianity (either by emphasis or by negation), not the other way around tbh. plus dialectical materialism doesn't inherently contain ethics or morals, people just input their own.
i'm absolutely whatever on people hating christianity due to their own horrible experience, that's fair enough, just as it's fair for people in shit situations to embrace it. dismissing it however, as non-productive/non-compatible with our goals, is judging by history, not a great idea. *it's non-compatible with feuerbach religion development which marxists typically use (i think its feuerbach?) and thus with ontological view in general, but compatible with goals with some shenanigans on emphasis, same as anarchism tbh.