And I believe there is great value in the ability for people to see these extremists ideas and not forget their existence. Not forget our past.

If that's your argument... why not just build a museum? Or have an educational program in schools?

Insofar as racially motivated terrorism is a plague, it seems like you're suggesting that we allow a reservoir for the plague so that we don't "forget our past" experiences with that plague. Contrarily, I'm happy to learn about Yersinia pestis in school or at museums, not by allowing an ecosystem for it to exist.