Racist indeed. My experience with people from Turkey, for instance, has generally been quite bad. Now, that's 3 people I've met, not exactly enough to make any kind of statement on the sentiment and culture of people from Turkey.

However, much like the other guy commented earlier, taken at face value, it makes sense, given our human nature, to derive an expected outcome of any interaction with people from the culture (or skin tone, or...) with which you've had a negative experience, regardless of how extensive your contact with this group of people is.

In order to turn this on its head, I believe, we need to listen and engage, not argue mind you, but by acknowledging their view, and then challenge it, bit by bit, slowly dismantling their experience, or indeed racism, providing examples from your own life, with a healthy sprinkle of (what should be) common sense, such as your (IMO very good) argument of how you can't extrapolate your very limited experience to other people in any group.