Trump's rallies killed his re-election
Instead of changing his behavior to make people in the center like him, he focuses all his attention on the MAGAs who already do. This makes the MAGAs like him even more, but distances him further from the majority of the country.
It's self-defeating in two ways. It pushes the center away, and it also causes so many MAGAs to show up that he's fooled into thinking he has the majority's support.
It's fooling the MAGAs as well. They are not prepared for Trump to lose by a landslide. Who knows how they will react, but one thing that's for sure is it will be glorious.