Which would defeat the point, because then we'd be stuck with arguments over what is and isn't violence.
Cars and windows are not people.
Our criminal justice system should, and usually does, distinguish between property crimes and crimes against people. I believe discussions about protest and violence and property damage should do the same, even if you believe both are criminal and should be punished.
Also, even when people are not in the cars, it is a "popular" hate crime to intimidate people by selectively destroying their property.
"We can do this to your car; we can do it to your home, too, even when you're inside" is the message.
I think it should simply be that no one has justification for violence or intimidation.