Yes they are but that type of racism is currently socially acceptable. it shouldn't be but it is.The current cultural meaning of "racist" is the assumption that all people of a given racial background have behavioral, intellectual, physical, and/or moral traits in common - just because of their racial background.
To describe "white people" (presumably European Caucasians) as "your" people obviously presumes that "white people" have traits in common that non-"white people" do not have. Thus, the sign is "racist."
then Eric Holder is a racist and so is the NAACP
The sign is clearly racist. Get to your point OP because I doubt that this was it. I have a feeling that squeeze beat you to it though.
I don't see why you are doing back flips on this one Colorado. The sign is racist by itself without bothering with the KKK. When you create something that is exclusive based on race it is racist, period. If the black water fountain were the exact same fountain and the white water fountain it would still be a racist thing to separate white and black drinking fountains.