And Here's Why:
There's going to be 2 cases, the first where you're an 100% racist/bigot and you know it (the typical racist). Or the 2nd case, where you are an all around tolerant person except when it comes to who you choose to date, that does't necessarliy make you a bigot or hateful person, but that is 100% racist. It's 'unconcious racism', in your head you've already decided that not one person in an entire race can be attractive to you. Every asian/black/white/whatever man/woman in the world no matter how much you have in common, no matter if you have the same religion, no matter if he/she attractive, intellegent, kind is not attractive to you.
Think about that, you already blacklisted all of them based solely on their race, that is undeniably close minded and prejiduce. But can you be blamed and removed from the public square over this? Not really, because although it's a racist position, you aren't necessarily perpetuating racism. When these discussions arise, for the most part everyone's reactions are "oh, you can't choose who you like" or "that's just the way it is", wrong. Honestly, most people are not strong minded enough to overcome unconcious racism, these ideals come from the environment, the culture of racism, society etc. you just happened to be born in. But that is a whole nother discussion for a different time.