I hardly think that any American politician could possibly have been FOR Assad, an archenemy of Israel. The hope was that the opposition to Assad would have been pro democratic.
I don't recall ANY American politician NOT being against Assad stepping down. Assad is an oppressive, lying jerk.
I don't recall even one US political figure that was FOR Qaddafi, or favored allowing Qaddafi to strafe his own citizens, Qaddafi was a bit of a nutjob.
The problem in Libya is that the US had no decent intelligence there, and neither did the Italians, the French or even the Israelis.
Isis, however, sprung up because of errors made by Cheney and Rumsfeld during the first months of the unnecessary invasion.