Experts in the field may be more knowledgeable, but there seem to be multiple attack vectors to me:

• Fight and advocate to reduce social injustice; people who feel powerless or left out vote right [even against their own interest]
• Support quality education that critically explores fascism and history, that improves media literacy, and logical fallacies etc
• Support social programs that help people in the scene get out
• Support social programs that prevent people from drifting into that scene
• Be a voice in criticism and watchdogging media, orgs, and [public] people