Of course not. Most of the people who protested the Czar were not Bolsheviks, most of the people who protested against the Weimar Republic were not Nazis, most of the people who protested against the Shah were not hardcore Islamics. But in the end, the ones who take advantage are the ones who are most ruthless and organized.
# Al Jazeera: AFP: Vodafone says that all Egyptian telecom companies have been ordered to disconnect services in Egypt #Jan25 less than 10 seconds ago via web
# Al Jazeera: Thousands of protestors on the streets of Suez. There are shots fired by guards of car showroom belonging to NDP businessman 1 minute ago via web
And the first people the hardliners polish off are the poor fools who were out there legitimately protesting.
It happened in every one of the cases you mentioned.