It absolutely is an ad hom, I'm just claiming that that is not a fallacy in this case, since the trustworthiness or bias of the dude is the thing we are discussing. Ad hom isn't always a fallacy. Nobody has even discussed any arguments coming from mjg, they're just chalking him up on a tally of who is on whose side. And I think the dude is super biased, and that whose side he is on isn't evidence of anything since he picks sides based on ideology, not on a case-by-case basis.