Apparently, the businesses around the area have been suffering, especially the banks and assurances, seen as symbol of Capitalism. Several banks on the main street around "Commerce" were closed, with their external windows being covered with wood. These windows were the easy target for a group of "breakers".
HSBC after vandalism
Now they have to cover the main door, and protect both the ATM (at the left).
The shop Go Sport selling sports related items were robbed.
Seeing this, I just wondered whether the French police are able to protect its citizenships and their properties. The publics are condemning these voilences, but there are people seeing it as a right to express itself. Some people explained that these breakers were from very poor families with no hope to come out of the poverty. This is the only way they could make themselves heard. As for the business owners, well, they have earned enough money and probably got rich through it, so they shouldn't cry to the publics on what happened.
I'm not convinced that breaking is the only way of expression. But it is a popular ways and the French goverment is too scared to provoke them. They have been lenient, the breakers are captured and thrown into jail just for several months, then they are out again, waiting for another opportunities, and demonstrations are the best occasions to show their talent.