One thing I've never understood, is why the fuck do people care about stuff like "white solidarity"...

Why does someone care if their great-great-great-great-grandchild wont be white anymore because someone along the way married and had a kid with someone who wasn't white when they are long dead?

It's doesn't matter at all if 1000 years from now wether or not 100% of humans are white, black, or somewhere in between.