Let's play it fair, if you're born in 2010-2012 and you act like a Gen Z, you are Gen Z, but if you say words like "Skibidi, gyatt, rizz etc." you are Gen Alpha.
But did he attack anyone here? I don't think so, meaning he has a right to share his opinion like this. And if he attacks others using his opinion, then it's best to ignore him entirely than harassing him and making things worse.