It's routinely stunning to me that religions criticize the fundamentalists within their own ranks. If you really think that your special book is the revealed word of God, shouldn't you be following that thing to the letter?
I mostly agree with you. However, some people add stuff that the Bible doesn't actually teach, and that's where I start to get skeptical. I don't know much about this denomination, so I don't really have an opinion. I'll give a couple of examples:
1: Some Fundamentalist Christians are opposed to dancing, because it can lead to sin. Some are against the celebration of Christmas, because of its connections to a pagan holiday. But nowhere in the Bible does it actually say that Christians shouldn't dance or celebrate Christmas.
2: Some Fundamentalists make weird claims about the end times and about how some politician or celebrity is the Antichrist. This should be criticized.
The bigger problem in American Christianity today, I believe, is the opposite. Any suggestion that parts of the Bible are in error strike at the foundation of the faith.