A racist harbours prejudice against other races but someone with anti-multiculturalism views looks at the bigger picture in that it can cause division and fragment society into smaller closed groups, that it should not be encouraged and avoided if possible.

I see the promotion and huge increase of multiculturalism in society through open border policy as divisive, a cause of racial tensions between cultural/religious groups. Why?.. because they are often too different to be able to integrate and rightly or wrongly, on the whole, have no real desire to do so.

If one was cynical, one might suspect alterior motives behind this social experiment. To divide and effectively enslave society under the mass surveillance required to facilitate it? Who knows..