Take responsibility for the face of the world. The symbols of today enable the reality of tomorrow. Notice the swastikas and other signs of hate. Do not look away, and do not get used to them. Remove them yourself and set an example for others to do so.
Check this book with 20 relatively specific actions written by a historian https://en.m.wikipedia.org/wiki/On_Tyranny
Also here are the rules briefly summarized. https://scholars.org/contribution/twenty-lessons-fighting-tyranny-twentieth
I think this one rings particularly strong today.