Yup, they would. And not only that, but they would stone to death anyone that blows their illusions of always being right. For instance, if they claim that sickness is a result of disobeying God, and you are naturally healthy (and do not get sick), when someone else gets sick that is more righteous than you, you would get stoned to death to protect that illusion that sickness is the result of disobeying God (and more so if you stay healthy because of disobeying God).
This is why we had better hope they are not successful in plunging the world into the Second Dark Ages. Not only would apostates be threatened, but everyone else would be their property. You do exactly as they say, or get punished up to and including death. They could ask you to do mathematically impossible things just to set off punishments at will. You earn something, you still need permission to use it. You buy it, you still need permission. And so on. I believe that they are earnestly seeking to get the Critical Mass necessary to usurp governments, just as the Catholic church did when they plunged the world into the First Dark Ages.