You mean, like exposing biology students to creationism ? No, I don't believe so. When an idea has been widely discredited, there's no reason a place dedicated to knowledge should be required to host it.
I can agree with the fact that an individual should not be persecuted for harbouring views. Ideas such as nazism, however, have no place in our society outside of the historian circles, and no one should be required to assist anyone in disseminating them.
You could look at it from the other direction. Once you agree that outright fascism is not to be given a platform, fascism lite (and I think there's some evidence that 'alt-right' is a sort of rebranding of modern white supremacists, white nationalists, and neo Nazi types) should maybe also not be given a platform.
Death by a thousand cuts. Today, calls to institutionalize trans people, undo the civil rights act, or put gays through electroshock therapy. Tomorrow, expulsion of the Jews?
I can agree with the fact that an individual should not be persecuted for harbouring views. Ideas such as nazism, however, have no place in our society outside of the historian circles, and no one should be required to assist anyone in disseminating them.