I had no problems with Beck when he was CNN. I watched him almost every night.
Then he went to Fox News and appealed to their audience. There is a vast difference between CNN's audience (mostly moderates and independents) than Fox's audience (far righties), so Beck had to get weirder to appeal to the Fox News crowd. It took awhile but the weirder he got the less I watched him.
At CNN, with the restrictions CNN put on him, his ratings were in the toilet with everybody else. When he came to Fox, he was allowed to do the show he wanted to do, and his ratings eclipsed EVERYBODY else at CNN and MSNBC and HLN combined in his time slot and he beat everybody else at those networks in whatever time slots.
He didn't get 'wierd' to accommodate a Fox audience. A Fox audience doesn't tolerate 'wierd' very well nor does it tolerate cherry picked information from any ideology very well. They do appreciate good research and information you can't get anywhere ele. Fox provides that and Beck provided it in spades.
Beck never suggested anybody ought to believe anything just because he said it though. He points people to the same sources he used to develop his thesis for every program and encouraged them check it out themselves and draw their own conclusions.
He would not have been allowed to do that at CNN.