Depends if you define firing at and killing protesting civillians as brutal. This crackdown happened long before ISIS and other groups joined in.
http://www.bbc.co.uk/news/world-middle-east-26116868
I think if I was a civilian in West Aleppo I would be cheering the government forces ... mainly...
By 'plot' do you mean Syrian people following others lead in the Arab Spring .. protesting against the Assad regime, wanting more freedom and democracy?
We only became involved much later because of the brutal response of the Syrian government.
"We're learning price of not intervening"
We were understandably hesitant after previous failed interventions and I have no idea what the best course of action would have been but not intervening also has tragic consequences.
Also haven't read much condemnation of the Syrian regime ...