Shia would be easier to handle than Sunnis
Yes simply because they have fewer resources compared the monsters in Riyadh.
There are other factors invovled too.
But also the Shia's have the history of syncretism, accomodating other aspects/cultures. In the long-term this is dangerous as the Ahmaddiyyas show, but in the short and medium term, the Wahabbis are a virulent strain that must be eradicated.