Don't think I ever saw this. But then again I'm in a blue city, so there's that.
Edit: Not saying theres no racism, there is a lot in fact. But I never see the type depicted in this comic. Its either overt racism with yelling slurs, or its just a normal interaction. I dont see much passive agressiveness.
Could it be that you're a straight white male who doesn't mix with people outside that particular bubble much? I'm one of those, and I'm willing to believe others when they say it happens, and how often. Even in those places where the majority vote for the more progressive candidate.
The liberals do it almost more than the conservatives. It's more open racism and avoidance but somehow it's a kindness to talk down to people of color in the eyes of the liberal.
I'm a man and I've never been catcalled, but I can believe women who overwhelmingly say it's a common experience.
A non-black person saying they've never been followed around a convenience store, or dealt with adultification (the phenomenon where racial bias leads people to treat black children more as adults, including things like the first row in this comic assuming a young black woman is holding her own daughter).
We all live our own experiences, so trying to deny that something happens based on not having experienced it yourself is just being obtuse.