I don't think most Xtians are any more fanatical than anyone else. What do you mean by fanatic? That they are deists? There are plenty of them out there who don't bother anyone.

I don't think religion is the real problem. If a particular branch of religion is a problem, it's due to the underlying tribalism that the religion is hanging on.

Tribalism predates religion by millions of years, and it's all you need to initiate hostilities.