Tens of millions of communists have died fighting for the emancipation of the working class. Half the world was communist at one point. The people you call “MAGA communists” are an online micro-ideology of a few hundred infantile Westerners, who most communists are not even aware of, and who all communists who are aware of them reject as explicitly anti-Marxist and crypto-fascist. They have no relevance to communism whatsoever.
This is one of the purposes of the ‘tankie’ slur - to associate Marxists with people who are explicitly opposed to them and so fringe as to be otherwise irrelevant. In this way the ideas of communism can be confused and distorted in the public consciousness.