Actually a lot of them don't. It's weird but a lot of polling has found that a big chunk of Trump supporters somehow believe that all the outrageous things Trump says are somehow just for show, or are sarcasm, or just a joke. I'm not talking about the maga hat, rally goers, but the more average Trump voter who says "the economy" is their top voting issue.

Trump couldn't win a national election with just maga. Somehow getting the more normal Trump voters to believe he might actually do what he likes to talk about doing, might really help.