Shops were ransacked, cars were burned, schools were burned,...

Shops were ransacked, cars were burned, schools were burned, hospitals were burned. Yes, lots of people were arrested, and this is a normal reaction. It would happen everywhere in the world, including the United States itself when it had riots in its major cities. Now these people will face criminal charges, and if they are found guilty they will bear the consequences of their deeds. If not, they will be released, just like any judicial process in the world.