Unfortunately through history much cruelty has be done in the name of religion.
Religious "fanatics" have done all sorts of things to enhance their own religion and discredit another religion.
If someone does not "agree" with your religion it seems to give you some sort of "right" to kill them, torture them or go to war with them.
Queen Mary (Bl**dy Mary) burned many protestants at the stake who would not convert to catholic. Around the same time many Catholics were burned at the stake when we had a protestant king or queen.
The spanish inquisition was responaible for much death and torture (and more) in the name of religion.
And so it goes on.
All pretty pathetic as all religions are "made up" by man, based on writings and teachings, and each religion has their own views and traditions.
All religions, I think, promote peace and "love thy fellow man", except when it comes to someone who is of a different religion.
The world would be a far better place without religion.