Mozz71, a good question and one that I shall try to answer.
In a normal day to day situation, I condemn any kind of violence. I disagree with vandalism (apart from my case!) and do not agree with theft.
However, we are in a pivotal time in society. Those who are rioting aimlessly will no doubt be prosecuted. (Remember the London riots, and how almost 80% who were involved were charged and put on the news?)
However, those who are retaliating to the aggressive police presence, those peacefully protesting and those maybe making a bit of a mess but not going to far will help with their movement and message.
It's a hard one to answer. Racism, undoubtedly is a massive issue, one that has been present since the dawn of time and unfortunately, something that will be present for the foreseeable future. Items can be replaced. Bronze can be smelted and moulded into new statues. Stores have insurance. All of these assets are protected.
One asset that isn't protected is black lives. A life is priceless, so don't try to use vandalism as a reason to ignore it. I draw the line at life.