Yes, what possible alternative can there be to a regime that sends its troops and tanks into its own cities and butchers it's own people.
How can one expect change by not doing something. Islam is against causing unrest, it encourages you to use existing legal avenues to voice your concerns and to bring about change. Worst comes to worst, you are to leave that country rather than being a "fitna". However, what is taking place in these countries, including syria is unprecedented. You have masses of people who are fed up after decades of trying to change their living conditions without anything success and all they wanted to do was to demonstrate.
The response they got only helps their case, lest one is completely blind.