Funny enough I've never heard of Perez. Sounds like he's jealous of her fame. His comments were in no way justified. First he admits he knows nothing about her, then attacks her for being guilty of something he knows nothing about. I mean even a simple fucking google search would show that she is the creator and writer of an extremely successful web series about guilds and mmorpg's. That in itself should be enough to warrant her "qualifications" for being in the game industry (as if you really need any). On top of that, she isn't even trying to be in the games industry, she's foremost a writer and actress, so what exactly is the problem with that?
Not to mention the fact that Perez is a MASSIVE douche, and if anyone doesn't deserve to be part of the games industry, it's him.
Sounds just like another typical "you're not a REAL nerd like me, only REAL nerds are allowed in the game industry, NO GIRLS ALLOWED" situation, only it backfired because it turns out who would've guessed, she actually does enjoy games, and has more credibility than he does by FAR as a "nerd".
If there's a lesson to be learned here it's probably "Don't just fucking assume things about people without doing your homework, also don't just be a general douche".
Edit: I just realized he lost his job from this incident. A bit harsh for a simple tweet, but the guy was an idiot, and in all honestly, deserved it.