They do this crap just to satisfy their idiot base.
Its all a game.
Somebody should put out the word, that in life, there are no do-overs. The moving pen having written, moves on.
There can be smears, and even attempted erasures, but both are ugly and the obvious attempt to obliterate the record is there for any discerning eye to see.
Obliteration of history ranks right there with the other crimes of history like genocide and international treachery.