Racist Comment?

I met an old white woman on one of the streets near my hostel who told me in my face, "Get away, you cockroaches!". I was crossing the road so my usual quick wit did not allow me to come back with a biting comment. Hmph! I do not care but I certainly wish she would not do that to another yellow person.

P.S. There were no cockroaches. It's the dead of winter. No insects...