No. People make generalizing statements, "I don't find asian men attractive" but I highly doubt they mean every single asian man on the planet. There may come a day they come across an asian guy they find hot, but if they deny that attraction due to the man's race then yes, they're racist. But if they're like "Oh, thats the first asian guy Ive ever been attracted to" then what they claim is their sexual/physical preferences is not something they just made up based on racist social norms.