Painting a wall is not violence. That is an extremely pro-authoritarian, hyper-capitalist viewpoint that is useful for the state and the property-owning ruling classes to enforce their rule. It has no basis in fact. Painting a wall does zero harm. If you own a massive building that is not your home, you can afford to paint over it. You don't need to though, because it is used by members of the public, not you, so it's actually meaningless to you. It's not the same as if graffiti artists painted over the front of your house as a middle class person. So there is no reason for you to be mad for uber-rich people who do not care about you. Walls that are used by the public should be owned by the public, and by that logic we all have the right to paint it whenever we want to. Just as you could paint a wall in your house.

It's scribbles on the wall, it's hardly violence.