Are they? Remember, a successful violent "protest" is often just retroactively called by a different name, like "revolution" or "coup d'état", it's not as if they're fundamentally different things. How do you compare those to successful peaceful protests?
Mobs don't win wars, they merely destroy and the rest is left to fate, often with disastrous results(see Libya as an example).
Mobs can't sit at the negotiation table
Mobs can't agree to treaties and enforce them
Mobs can't form proper functioning and recognized government.
You seriously can't think of any counterexamples to that? Like maybe some French (contemporary and historical), German or Russian counterexamples?
People always forget that the Russian Revolution was followed by war between the Whites and the Reds.