I'm probably a bit biased, as I believe there is a "tribal" nature to humanity. We're basically not too far removed from packs of animals (flocks, in most cases, actually, but some of us are more K-selected.)
In all of recorded history, we're a drop in the bucket. Seems humanity as a whole isn't much better, if we go to "unrecorded" history.
Some of those programs on National Geographic or such, talking geological time scales?
That's the scope I mean. We haven't been around much, and haven't changed much, if at all.
How many here are "jocks"? "Rockers"? "Skaters," "Slackers," "Engineers," "IT," etc? And we go after those NOT in our group to a greater or lesser extent. E.G., as an IT guy I DESPISE the "Business" people who want to squeeze us until we bleed, while they
pretend to work all day, playing with reports and meetings... Talking the "Bottom line" without any regard for the stuff we have to work AROUND, mostly - because their great "money saving idea" only LOOKS good. E.G., outsource the tech support (all the infrastructure) to India. What used to take 15 minutes to get done, with ONE person in the US? Now takes three tickets, five people, and 3-5 WEEKS. But it's "cheaper"!! Except our throughput is now down by 75%. We're not effective.
DEV is bad enough - they throw their program over the wall, and we have to pick it apart and tell them what's wrong. They don't like us. But at least they respond....
Going to Macro scale? Male vs. Female. American vs. French vs. Russian (or, use the country names, same diff. for this). Keynesian vs. Austrian economics. IBM vs. Dell vs Oracle (different fields, of course.)
"If you're not with us, you're with the Ter'rists!" might be over simplistic - but if we borrow from George Carlin...? "Think of the Average American (human, even!) Think how DUMB that person is! Now, realize - HALF the population is DUMBER than that!" And he didn't even include the mob mentality, which is - the Mob is about half as smart as the dumbest member. Herd mentality at its finest, if you will.
So... there is LIKELY to be a racial preference built-in to humans, to ensure a cohesive tribe.
But that doesn't mean we're attracted to everyone equally, and attraction I don't think can be a racist thing. If I like blondes but not brunettes, am I a Hairist?

If my girlfriend suddenly dyed her hair brown, would I break up with her? Seriously, how shallow can you get?

(I'm also sure it's happened, see George Carlin again.)
However, attractiveness can also come from being Exotic. Think a Western man in Poland or Ukraine; or a Russian woman in America. Or an Indian woman, for that matter. Something has to happen to make a woman stand out, to me. Whether I notice her breasts or eyes first is irrelevant...

That's the initial attraction. Physical rush.
But will there be anything there? Well, is she kind? Genteel? Feminine? These things aren't defined by her race. Met plenty of hot white girls I wouldn't (censored) with someone else's (censored), you know? Arrogant, brash, aggressive, entitled, nasty. I'd rather beat them with a stick. Been around plenty of other ethnicities, too, and found both types... Good and bad, feminine and masculine. It's not a Racial thing, nor is it racist, even if you exclusively like whites, blacks, Inuit...
Racist means you pre-judge someone based on their skin color. Somehow, people think it's a BAD thing to judge...
How many of you been through the 'hood? Felt the naked hatred in the stares you encounter? Sesame Street it ain't. But I'll drop that line of talk...
You can't choose your tribe or family by blood. You can choose who you associate with, though. If someone has excessively harsh pre-judgement, especially because "they heard...", you might want to look elsewhere for friends and companions. If you don't have that option, you might want to guard that their views don't infect you, as "memes" are like a virus. (Goebbels, "if you repeat a lie often enough, it becomes the truth...") You want to be honest and fair in your dealings, but also not a fool. That guy coming at you with a scowl, he might not mean you harm - but why take the chance? Cross the street, see if he follows, looking for trouble. The woman shooting daggers at you with her eyes? She's saying something, though a man might not get it... He'd better watch both his and his woman's backs, just in case. Etc.
Personally, I was raised to NOT be racist.
I learned the hard way to respect biodiversity. I still give people a chance, but I'm somewhat selective based on my environment. Greater or lesser chances, if you will. No different from a woman taking her friends to the ladies' room - she's safer among others, than alone, in the "old days." Same as you don't go down that dark alley at night, because it's a "bad area." You stay where there's light...
I don't think that's racist in the least - because anyone can be good, or bad, and race is small part of that.
-Dianna