Because the thought of alternatives to Abrahamic religions literally distresses them at a subconscious level so they attack it as 'evil'. This is why you so often see Christians describing atheists on this website as 'wanting to rebel against God'. How can anyone rebel against what they don't believe in?
It's the fact that atheism suggests there is no God which bothers theists & polytheism is another issue which puts their beliefs into question. To be fair it's not just Christians: fanatical Muslims in Afghanistan have been destroying the ancient Bamiyan Buddha statues too which is in principle for the same reason as the Greek Orthodox Church forbidding Pagan worship. As an atheist I have no problem with anyone worshipping anything they want to, as long as it doesn't impact negatively on other people.
I just wanted to correct ragtagkittycat. 'most' religions do NOT believe theirs is the one and only true religion. I wouldn't even say that most believers feel that way.
Only christianity and its copy-cat islam pretend to hold a monopoly on the truth, and I don't know many rank-and-file christians who support that dogma. Never met a muslim who didn't, tho, so the numbers might even out. Many christians actually support other faiths.
My catholic family participated in a wiccan ritual on the day of my mom's funeral. She requested the wiccan ritual, so that helped, but only two nephews stood aside, and everyone complimented me and my team on how moving the ritual was. So while there are still a large number of exclusivist whackos out there, I don't think the greek orthodox hierarchy is representative of all christians.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.