Then we should ban all flags from being used on the server.
I take offense to the American flag, because the american people killed off the native american people and took their land from them and slaughtered men, women and children to do so and imposed their will upon them.
I take offense to the confederate flag, because confederates were pro-slavery and I have black friends.
I take offense to the Russian Flag because they're currently engaged in a proxy war with Ukraine, killing civilians and government soldiers alike.
Should I go on?
Theres plenty of reasons you could say your against a flag, but in the end, its freedom of expression.
You might be offended by it for certain reasons, but he might not support that flag for them reasons.
Saying that is like saying all because I wear a confederate flag, I hate all blacks and want them as slaves. But my reasoning behind wearing that flag is simply because I supported the confederate government based on where I lived during the time and other values that they stood for.
(No I do not support the confederate flag, but again, I'm not bi*** about it because its apart of history and deserves to be remembered as such)
TL;DR: If you don't like it, don't pay attention to it. If he's doing it to intentionally upset you, making threads like this is basically saying he won. Be the bigger person and ignore s*** that you don't like. Now if he goes IG saying racist/sexist s*** towards players, then feel free to take action. But until then, its a flag. If you don't like it, ignore it.
Do I care if you hate me? Do you wanna know the truth?
C'est la vie, adios, good riddance, f*** you.