A lot of people are judgmental of protesters breaking windows, burning books, etc. They call this violent behavior.
Now, by no means do I support or condone the destruction or theft of property. I do not condone the burning of books at all. Well, except the Mueller report. Even in that case, it should be preserved as evidence of criminal behavior by our intelligence agencies.
Spray painting graffiti on buildings and statues is unsightly. That’s kind of the point, isn’t it? However, that’s not violence. It’s an inconvenience. Paint can be washed off by one means or another.