There is a reason for it - it's all carefully calculated, and it's quite a rabbit hole. There's no short way of describing it, but in a massively simplistic way, it's almost not important to them who is smart and who isn't - in fact, their methods work better if they aren't smart. It's more about demeaning the people they're arguing with, so that in a superficial way they can make it look like the smarter people aren't so smart afterall - and then their hairbrained arguments gain traction because there's nobody around anymore to be taken seriously when we say this is insane.