These people could have a bonfire with all the different bibles and religious text I have in my house. Heck, the Bible I bring to church has four different translations, all side by side.
Just because they're (other religious people) of different religions doesn't necessarily mean they're praying to different gods.
And this isn't Christian fundamentalism. Nor should these people represent Christianity, and if you allow one small group of people's actions give you the ability to judge all the rest, you are making a mistake!
Don't let this be your measuring rod for christianity or any religion, after all these people are just nuts anyway.
"God wants spiritual fruits, not religious nuts."
"If they give you ruled paper, write the other way"
"Where books burn, so do men"
I think these are all pertinent quotes, I only wish I could remember their authors.
These people are wierd and wrong!