It's a very cheap virtue signal that avoids some potentially nasty repercussions.

I meant their resistance to them engaging in inter-racial coupling.

Statistical evidence would disagree with your personal experience, anyway.

I think it shows the opposite. Again: outcomes of relationships is not the same as relationship preference. It's not a surprise to me that whites get into relationships with other whites, and the vast and sweeping majority of the time, it has nothing to do with both of them choosing to date white people for a racial reason.