Comments like these are why I have friends who like playing MMOs but absolutely refuse to group with random players for dungeons. They got plenty of this in WoW back in the day and they are not going to tolerate it anymore. For every "I'm quitting FFXIV and here's why" post you see on the forums, there are many more players out there who just quietly leave or refuse to engage with MMOs in the first place. Telling them to "grow a thicker skin" or "it's not that bad of an insult" is not convincing.

It's also probably a large part of the reason why all the MSQ dungeons are made to be single-player with NPCs. People just don't want to deal with hostility and insults when they're supposed to be having fun.

You have to wonder, is this the first time that player has insulted others in chat? If they did, it obviously didn't come with any consequences. Why would they stop now?