Instead of asking questions of why we should accept the help of a potentially dangerous organization, ask why it seems like they are the only one who's actively trying to help us fight?
I don't recall asking why you'd accept Antifa's help. Criticizing Antifa isn't the same thing as spurring them completely.
As much as it's academic and it might be thought exercises for you,
Actually, this isn't academic for me. Antifa arguably is. The idea of abolishing police isn't.
The reason why I'm not debating your points is that I'm not in the position to debate them. But with calls for disbanding the police no longer being fringe, as someone who's seen people injured by members of the public, whose harm was only stopped by the police, then no, this isn't academic.