How do I know Rubashkin isn’t Moshiach? Because he’s a Levi, that’s how.
Katan Hashtus, while chazal did not teach that being careless about dina d’malchusa and being a convicted felon [specifics edited] qualify one to be moishiach, they also didn’t teach that it disqualifies one. It’s completely irrelevant. And the whole Rubashkin family are true tzadikim, as anyone who knows them can attest. But they are not descended in a male line from Dovid Hamelech, so that rules them out.