human invented things all the time: gods, epics, stories, myth, religions, etc. Why cant we create narratives that help us feel more comfortable in our own skin as long as it doesnt harm other?
Meanwhile you have the option to move on after seeing what the game is, but choose to stay and be hostile. Maybe examine yourself and ask why do you think its necessary for you to get involved.
There are only 1 human race, yet we have 193+ flags representing imaginary places and lines, so why cant people have flag to represent themselves?