No, you are correct that they are not as violent as the their much more numerous Islamic counterparts. The more concentrated they are the more violent they become. Try driving through on of their neighborhoods on the Sabbath- you won't feel quite as sympathetic.
But, I won't be beheaded.
I agree with you that extreme edges of any religion can be dangerous. However, you have to go to one hell of an extreme to be compared to the Arab terrorists we are dealing with now.