The state army counters the peaceful protesters with murder and violence. Some of that army (you know, the ones who presumably don't like murdering civilians) defect and fight back against the state army. That's insurrection, not terrorism. Don't abuse the word.
At least 1,000 Israeli Arabs protest death of Palestinian infant in deadly West Bank arson (Haaretz)
from the article: Hundreds of thousands rally in Syria as 32 reported killed