There is no honor to be had through violent retaliation. I'm sure I don;t have to explain to you what that leads to.

If you really want to overturn a fundamental injustice (and not satisfy some base craving for revenge following a single event, as if injuring the first wrongdoer somehow makes everything okay), your greatest option is to secure the moral high ground. I really doubt most bystanders were concerned about why those rioters in the UK were lobbing firebombs, they just saw a riot, which is never a good thing in anyone's book.