This is inaccurate. The anti-Monero trolling started almost from day one when there were hardly any Monero supporters, maybe none at all, and rpietila was not yet involved. As already noted most of it started with BCN sockpuppets (and some DRK trolls). Imitators likely followed, since trolling XMR become something of a sport.

Regarding business practices in the alt world, they are indeed scammy as all fuck. Even the BCN scam wouldn't really violate "community standards." The only thing that made it different from 99.9% of the alts was some interesting technology that was worth adopting into a non-scam project (Monero).

So I agree that a lot of the hate is the backlash against wading into a cesspool of scammers, holding them up to reasonable standards of honesty, fair dealing, and non-scam-friendly business structures, and seeing that virtually all badly fail such a test. Rpietila is to be commended for not slipping into the faulty logic of "they can't be scammers" and lowering his standards. They can be, and they are.

Even more than usual that kind of hate is a complement.