Everyone is so different in this world yet were all the same. Were all hi trying to make a way through life. If someone's a dick there a dick has nothing to do with race or religion etc.
My 3 of childhood best friends were mixed heritage. We never felt like we had to tip toe around being PC with each other. I knew they were different from me in there heritage to me but I still liked them for them.
It's actually very common in the UK and some other parts of Europe to see friendship groups of all different races.
I've even moved to a more white area due to my work and I still make the same effect to talk to my black/Asian co workers as much as I would with my white and I've learned a lot of my friends of didn't ethnicity actually hate when white people think they have to step on eye shells around them. I had one guy I used to work with and he was black and we used to joke but he was dad because we got on so well.
I just do not understand it and I will probably never. I know my country isn't perfect when it comes to certain things including immigration but I do love it for the fact but we have so many different cultures and we are open with sharing them with one another.