I suppose it depends what you mean by religion. If, for example, a group of Baal worshippers started sacrificing their first-born children, then the government would have a right to step in and stop them.
If a group of us got together and said that our religion believes in child incest or feeding babies gin instead of milk, that too could be stopped.
Keep in mind, that my remarks were in the context of a group of people who snapped a child's neck as part of a religious ritual. Most people would say that the perps should be tried for murder. And if this action was actually part of their normal religious activities, and not an aberration, then the religion itself should be rooted out and banned just as you would root out any other group of conspirators to commit murder.
In fact, unlike some posters to this thread, I don't believe Wicca is necessarily evil. I believe it is foolish and misguided, and may open the doors to real evil. This particular group of people who call themselves Wiccans evidently have real problems.
The belief couldn't be stopped, only the act of incest or feeding babies gin.
And if this action was actually part of their normal religious activities, and not an aberration, then the religion itself should be rooted out and banned just as you would root out any other group of conspirators to commit murder.
No, it couldn't. The government does not have the power to ban religions. The only thing the government can do is arrest and prosecute people for violating laws against murder, child abuse etc. The government absolutely has no power to ban any religion.