So lets start making white men jokes in those teams on the regular. And no, in real life, I did not seen all that many of those.
There is situation in which everyone mocks everyone. But the situation described here is that some people are valid target of jokes and others simply dont.
I think this may depend a lot in which European country. UK is absolutely filled with self deprecating humour no matter your race or sex.
I am currently at an hotel with an international audience and was part of the daily 'show' a couple days ago. I made the entire audience laugh when I joked about not knowing how to sexually satisfy a woman (I am a white man if it helps).
Think it depends a lot on the general tone. Are women targeted for sexist jokes as much as men and the jokes are free for all? Probably ok. If 95% of the sexist jokes are about women, probably not ok.
But for example, I found that a lot of Eastern European men make sexists jokes that are mean and at the same time, can't take the smallest joke about themselves (or worse, their own sexuality).
It's really hard to generalize a group on that level unless you're on the outside looking in.
There's plenty of jokes about man-bun and skinny jean wearing hipsters floating around. There's plenty of jokes about white trash floating around. I'm not sure what a joke about white dudes in general is going to look like barring the obvious case where you generalize a joke about white trash or hipsters to all of them. It's going to be very hard for a group of mostly white dudes to joke effectivly about white dudes because as members of that group they all see that group in higher resolution than that.
By this logic, you have to ban humor.