The problem with free speech rights is that it isn’t ONLY speech. I think free speech should be just that, discussion, debate, writing, art, music. Not destruction of any kind and boy do I hate graffiti of any kind.
Acts of destruction are already crimes. They should be dealt with on that level without glorifying it as “terrorism” (a troublesome term because it has an inevitable subjective element).
But a belief in political pre-eminence for a particular bias is completely protected.