Unfortunately, our government and educational system has bought into multiculturalism almost completely. It's not just liberals because few in government or education speak out against it. Silence is agreement in politics and the education.
Sadly, our govt and educational system are controlled by liberals, so they had a leg up. Plus, they get to frame the argument that if you aren’t a multiculturist, you are a bigot and a racist. To foster that perception, they have the luxury of the media to help.