Spray painting a panzer tank in 1939 with "free the jews" would have been a pretty much identical form of "terrorism".

Nobody killed, no real damage done.

Obviously the Nazis back then would agree with modern far right that defacing weapons used to commit genocide fits the definition of terrorism and that voicing support for such a crime demands prison time.

And, modern liberals have always had an easier relationship with the far right than they have had with free speech.