We've seen poll after poll for a couple decades showing that Fox News viewers have a weaker grip on the facts than other news consumers. And we've seen that the conservative movement in the US will cling to ideas that aren't embraced by any other major parties in the Western world. And that most Republicans will accept a lie like "the steal" with no evidence, and even despite ample evidence to the contrary.
I don't want to infantilize anyone, but I'm not going to pretend that most Trump supporters are fully understanding the facts but simply coming to different conclusions. They are clearly and proudly ignoring the facts.