I agree, people I like the most don't share most of my interests at all. Yet time and time again all I hear is that "not like me" means a different skin colour

I agree, people I like the most don't share most of my interests at all. Yet time and time again all I hear is that "not like me" means a different skin colour or gender. It's like race and gender are the only differences but at the same time I'm being told there's no differences between races and genders. Which is it?!