I'm black and I wish folks realized that stuff like that needs to kept behind closed doors. I'm not one of those black folks that tries to twist the definition of racism such that it can never be applied to us. It's ironic that lots of the same folks who talk about "micro-aggressions" are purveyors of them.
Considering how dumb/immature the average product of an American high school is at 18, I'm not surprised they think like that (and are aggressive about their beliefs) Also, considering how some choose to treat college like an extended party, they carry over the same traits to 22.
But hopefully, the job market hitting them in the face after graduation beats some liberal bullshit out of them.
Also, class warfare and money will always trump identity politics and all that social justice BS. If there's anything the US can get behind it's their hatred of the poor (yes, well-off left are just as guilty of this, just more implicitly)
This is just a personal anecdote. I'm 23, also live in Ohio, and went to a very liberal private school. I have never met a single person who has un-ironically said these things.