Do they even go here?

This might not be quite related to Global Poverty and Practice, but here's something that's been on my mind lately.

I hear the comment, "Do they even go here?" in reference to black and hispanic people pretty regularly, sometimes on campus but especially in social settings. This comment bothers me for obvious reasons: just because someone is of color does that mean that they don't fit in at UC Berkeley, or even parties here? I don't think that people who say this type of comment really think about what they're saying, but it seems so outlandishly racist that it's hard for me to understand where they're coming from. When I hear it in party situations, usually it's people trying to make sure that there are only Berkeley students in the party, and they usually follow up that comment that asserts that the people in question are from Oakland. I grew up in the Bay Area and I know that while it is very diverse here, it is very segregated. Yes, there is a higher black population in Oakland. But does that mean that if someone of color in a party that they have to be presumed to not be a student, and further they must be from Oakland? It's so disappointing to me to hear people make these kinds of assumptions and only shows me that racism is incredibly, incredibly relevant today, and even in a university where I like to think that we strive for social equality and awareness.