Likely a sock puppet account taken over to spread inversion propaganda, where Trump denouncers get called MAGA just to screw with people’s perceptions and beliefs. Gaslighting, essentially.
Russian operated puppets have been spreading similar stuff everywhere they can. When MAGA ppl do something stupid, they’re instantly there flat out calling them lefties and communists, etc. to shift blame, confuse readers and devolve meaningful discussions into name-calling and pointless debate.
I fear there's a ton of that going on rather indiscriminately just to sow outrage, waste everyone's time, and demoralize people. I don't believe it's a left/right phenomenon. Anything that trivializes or antagonizes the discourse benefits American global competitors.