Pregnant by a person who can’t stand my nationality

My bf and I are the same nationality, Mexican. I found out I am pregnant and lately he can’t stop saying how he cannot stand the way Mexican kids or Mexican people look(describing his features.) He constantly keeps saying he hates our dull straight hair. Keep in mind I have straight hair. I asked him today… so are you going to hate your kid? Because you keep describing what our kid will possibly look like. He responded “idk. We’ll see.” I don’t know if he said it joking but I don’t take it as a joke.

He has 2 mixed kids from a previous relationship and lately he has been saying how he loves his kids being mixed. It has gotten to a point where I am starting to feel really bad. We have been together for 4 years and now that I am pregnant he’s bringing all of this up?