I’m trying to figure out a way to exclude it from First Amendment Protection, but we never planned on having a religion waging war on us...
It is not a religion. Religions don't worship a "moon god." islam is a cult. Jim Jones' Peoples Temple was just such a cult, though much smaller. The place to start is by realizing what it is and informing our neighbors as to what it is.
Much easier to put a cult out of business than a religion.