Okay I watched the video. The response was rude perhaps, but also blunt and honest. It wasn't attack against that person, or even Japanese games in general. It was an attack against a specific type of game genre that is allegedly prevalent in Japan.

At maximum I would call this a social faux pas. Certainly not something deserving of bullying.

If I were asking the question, I would actually value that response. Here's someone who is willing to be honest with me instead of using generic political speak.