By Islamic fundamentalism, you mean Muslims adhering strictly to the rules of their religion?

Well, I don't think that has anything to do with the discrimination against the hijab. Discrimination and stigmatisation usually are caused by external factors such as misconception, intolerance, arrogance, and selfishness.
Everyone has elements of fundamentalism in them, and whether they strictly adhere to it or not, I don't think it should be a cause of discrimination.