Yes, most women and men are racist. Most of the entire population on this planet has incredibly racist views, I'm not sure why this is even up for debate.
It's important to recognize that we're not always aware of racist thoughts and actions a subconscious reflex as you referred it to since every single one of us were brought up in a world where systemic racism is a reality. Ignorance does not excuse the act from being racist, however.
A lot of the distaste towards other races does not originate from the same innately personal preference of preferring Pantene over Head & Shoulders for your shampoo, but rather from influences that arise from the system of oppression that we live in. Saying you cannot date an entire race flat-out comes from a racist origin whether you are aware of that or not.
That being said, you're not saying that:
It's unclear to me why you're choosing to jump in defence of the problematics who hold the opinion of never being attracted to another race as an acceptable "preference" to hold.
It's also important to note the vast difference in experiences between whites and people of colour. The latter of us have to deal with nasty shit like fetishization or flat-out ridicule for being of a different culture (which you've already addressed), and that breeds exhaustion and apprehension for dating outside our own races. That can filter into why we find people of our race more attractive as well it's just less risk of being treated like an object. These cases of "preference" in people of colour also arise from the same system of oppression, but race starts to become less of an arbitrary trait and more of a safeguard; it's a sympathetic position to hold, to an extent. White people though, in their position of power and not having to fear the consequences that people of colour are subjected to? There's little explanation for "I'm not attracted to [X]" having anything other than racist undertones.
