Segregation isn't a thing of human history... If you don't put limits, you'll never know when you'll cross them or not.
Just imagine for a second, Black Panther movie with Black people only screening... holy shit, things would get ugly really fast, just saying.
I'm not sure what you're trying to say here... why would it be so wrong to let black people enjoy a film that celebrates their race, together? Why are you feeling so attacked by this?
I've discussed a couple times in this thread that everyone keeps using slippery slope arguments and you're doing just that. You should take a step back and realize these events aren't meant to be forced segregation, as other showings exist and these special ones are beyond the opening date. So you aren't being forced out of seeing the film, you're just being told this specific one is meant to be a celebration for a specific kind of people and you don't fall into that group. There's a vast difference between celebration that utilizes segregation, and negative forced segregation. Think of it like a bachelor/bachelorette party. They usually only include men or women, but they are that way to celebrate, not so you can look down upon and force out the other group.