I would be interested to know why you think that?
1. Because the United States Government doesn't have the authority to make me do anything I choose not to do. They can't "make" me turn in any person.
2. There is a separation between church and state clearly in our constitution, so there would be no way for our government to order the "round up" of a particular religious sect.
3. The whole idea that "government" is this idiological being, rather than what it is, a group of diverse legislators, is idiotic.