You don't get to get away from it. MAGA politics has made life a living hell for so many people that can't get away from it, and the only thing anyone can do is confront you with it every waking moment of yours.
The joke is that the song is inherently political, even before the language change to be current, and even without that change the song is explicitly about those people anyway.
Removes the plausible deniability about who "redneck" was referring to. I wouldn't be surprised if some thought it was a slur against natives. "MAGA" clearly says "you are in this picture and I don't like you". And some might even realize that they always were in that picture.