By what they're doing now ????
Having an eye in somebody's past is ok, exagerating it to use as an excuse to attack someone is bullshit. If he was that bad, he wouldn't be where he is in first place, he'd still be doing those things.
Mike ain't worse than Joe Son or Cody East. that Madadi guy stole someone's purse WHILE having an UFC contract. Nobody goes after the guy.
If talking shit about fighter's past makes sense, go after those too.
It seems people go after anything they find about him to discredit the guy somehow. That is bullshit.