You forgot in the first park that because of religion, good people will do good. And that is where the problem lies. You are saying that religion causes good people to do good then you are saying that religion causes good people to do bad. You can't have it both ways.
Plenty of good, religious people helped the poor and their neighbours but treated coloured people like shit because they where the descendants of Cain, the colour of their skin was the Mark Of Cain
Religion has been used to justify plenty of evil, abhorrent things and people went with it because "the holy book said so, according to the religious leader"...