These people defend the violence because they don’t own anything in life worth anything. Or alternatively they don’t have anything that they worked hard for and cherish. God forbid you save up years for a nice car, or work for your own small business, and a riot happens. You’re fucked!
Actually it’s not even that. It’s emotionally appealing to commit to an action under the belief that you’re liberating people. If you believe what you do is right, you’ll do it, but the only way for that perspective to shift is if another perspective is introduced and is not simply pushed away. It’s easy to “make the noise” but it’s harder when in a group doing just that to take a step back and consider the possible consequences or outcomes of the actions.