I just assume maga hat means you're racist and also a difficult person. The sort who do passive aggressive things to "teach people lessons".
That said, the only time I've ever seen a maga hats in the wild was a bunch of 12 yr olds on a class trip to the national archives.
The Confederate flag comparison is the most fitting, I don't see how anyone could object to that.
One last thing, I think it's unfair that purp is lumping all conservatives and even all trump voters into the maga pool. Maga is a cult, and he seems to be completely ignorant of that fact.