Lol, but is the criteria here racism, physical attraction or something much deeper? For example, I don't find Asians attractive at all (almost ever), I've seen maybe 4-5 in my life that appealed to me. But that's radically different from me saying Asians are BAD people just because I don't find them attractive.
Another problem with your assertions is that it assumes that one must out of necessity experience something to understand whether or not they like it or find it desirable outside of their own purview. For example, I don't need to jump off of a ten foot building to understand that death awaits. To go a step further I don't even have to see someone else die like this to know that it is/would be bad for me.
The reason why I said that it goes much deeper (and beyond the scope of this thread) is because someone could say that they personally have no problems with certain racial groups, but at the same time they don't believe in mixing races. Its even possible for someone to be attractive to other races of people, but still hold that its not good for society in general. And yes, people have something called preferences, so we will agree to disagree here. People not wanting to date outside of their race does NOT make them evil and racist, so stop it.
Sorry..
Ciao!