I don't know how. When people get sorted into fighting tribes by politics or religion, you can simply refuse to tell about your own, or pretend that you have none, or choose a weird option outside of the main conflict.

But when people get sorted by gender, or black versus white, it doesn't matter what you do, they have already sorted you. (You can choose a neutral nickname online, but offline you don't have that option.)

You can say that you don't care about these things as much as they do, or in the way they do -- they will call you a liar.

You can say that they are free to disbelieve but you won't join their fight anyway -- "your" side will call you a traitor, and the other side will accuse you of trying to trick them.

One option is to avoid the public places where the fight is going on, and only interact with your sane friends. But that's limiting, and sometimes you can't avoid the fight, for example when it comes to your job.