Obvious, a vote is an endorsement, yes. Whether MAGA does or Liberals don’t, I don’t know anything about that and don’t particularly care.
But even if you want to treat it as a chess move, it’s a bad one. It’s tactically wrong as well as ethically.
Obvious, a vote is an endorsement, yes.
Nope, that’s merely your opinion.
It’s tactically wrong
False.
Then prove that voting is objectively and endorsement of a candidate/party. That’s your claim.
For the second, you already agreed previously that it is tactically the best move.