Reread my initial comment.

Edit: for clarity. What I meant is that saying "vote because people died so you could" is stupid. That's meaningless Hollywood shit. It won't convince anyone in disagreement.

Saying: "your son is Minority X and is in concrete, material danger if Y comes into power" successfully helped me convince someone to vote against fascism before, despite them not being fans of who they were voting for. That is an example that worked in my situation, and won't apply to everyone.

We're no longer reasoning in the realm of fairies and unicorns, but are talking about tangible things that people care about.