They are crazy but not "utterly" crazy. Also, round 10-12 years ago they didn't used to be as crazy as they are nowadays. They seem to have got progressively more crazy over the years.

The thing is, a lot of the stuff what they says is indeed biblically-based and supported by the Bible. They just add a bit too much of their own personal craziness on top of it.

Many "mainstream Churches" are nowadays becoming every bit as crazy as Westboro Baptist is, just on the other side of the spectrum. Mainstream Churches are for the most part claiming that what the Bible (or good portions thereof) says is a lie. According to the Bible, that is apostasy and the dawning of apostate Churches as described in the Bible. Apostate Churches are no better in God's eyes than Westboro Baptist is.

The point is, many mainstream Churches need to own up to their own apostasy & stop preaching it, and are every bit as crazy as Westboro Baptist is.