Here are some true stories of things I've done:
Two weeks ago my Persian friend asked me if I knew of any schools that can teach him to be a pilot in a short period of time. I told him that if there were, they'd be nervous about having an Arab as a student.
A few months before that my Indian (as in from India) friend had to move out of his house, and asked if he could stay at my place for a while until he finds a permanent residence. I told him sure, there are lots of Indian reservations around here (Phoenix.)
Am I a racist?
I can't judge that without knowing what's in your heart, what your intentions were and why you held them.
All I can say for certain is: if I rushed to make a judgment without that information, I would become what my previous post was so clearly against. That was my point.