The Tops shooter is not MAGA. He makes that very clear in his writings. He is NOT a Trump fan. In fact, he is a one time communist who turned to socialism. He is a self described leftist socialist, authoritarian atheist. F ever that is.
Truth is, he is just F'ing nuts.
He seems to fit the incel model to a T. Probably an autist too. He got isolated during the pandemic and spent most of his time on line. There he found the chans and became infatuated with immigration. The really messed up thing is he wasn't even angry at blacks, but afraid the "browns" we going to take over the country. It is just supremely weird.