1. Anatomy of Fascism, Robert Paxton.
  2. Ur-Fascism, Umberto Eco.
  3. Blackshirts and Reds, Michael Parenti.
  4. Fascism: what it is and how to fight it, Trotsky. (and explaining the terminology used, by Engels)
  5. Refuting Holocaust Denial
  6. Learn the symbols.
  7. Debating Fascists: what to know before you do it
  8. The Alt-Right Playbook. Learn their tactics and how to deal with fascists!
  9. Anti-Semite and the Jew, Sartre.
  10. Anti-fascist handbook, Mark Bray.

Will update if you have recommendations (please with link if possible).

You don’t have to read/watch all of it (though it’s good to be educated and curious), but if you’re antifascist and want to be active, you need to learn about fascism and especially their tactics and symbols.