Yep. It was easy for us to topple Libya, and we almost succeeded with Syria as well, if Russia hadn't stepped in. A secular government is easy to stir up the fundamentalists against, to use them as foot soldiers in your regime change operation.
They won't have as much luck with Iran, since it's government is so strongly aligned with the fundamentalists, the pool of willing cannon fodder will be smaller.
I hope, at some point, these illegal regime change operations that the US and other western countries have been involved in for so many decades, will eventually stop.