It seems that there is something of truth in the domino effect (Remember the doctrine that caused the USA to assist south Vietnam in the war against communism - that communism would spread through the far east if it was not stopped somewhere).
Is this what is happening in North Africa and Jemen? All Islamic states, all with governments of doubtable reputations (corruption, oppression, discriminative, high unemployment,...) Will more states follow?
One thing is not so positive.
If people demand more security, they might make the move to the right, to a fascist totalitarian regime, because it provides security. That would mean more radical Islamic states, and not democratic at all. Which is a contradiction: These people on the street fighting for their rights use an ultimate democratic right, and they might agree to trade their voice, their freedom for security.
That would be the worst outcome.
We can surely miss more hate in the world.