I thought that scene was too on the nose, honestly.
Captain America's line about having a disagreement the last time he was in Germany was the only one needed. Though it was on the nose too and could have been better written.
The old guy would have worked better if it was clearer he was resisting Loki's God-power that was making people kneel. That's how much he hates authority he can overcome Gods. And then the old guy beats up Loki and we don't need the rest of the movie.