Yeah, it would be a different world all right. I sure as hell wouldn't want to live there as much as I dislike fundies of any stripe. The atheists can be just as militant and just as insulting.
I have experienced immanence. Something or someone is out there. But, that is personal to me. I can't explain it and I'm not going to condemn anyone because they don't share it. But, don't condemn me or insult me because I have this personal experience or belief.
OK follow this to the logical conclusion. This is the banner picture for Hitchen's personal blog Reason over Religion. How do you prevent parents from teaching their children. How do keep parents from taking their children to religious services. And that covers everyone from Amish to pagans. Trying to actually do this would make 1984 look like Sunday afternoon tea with the vicar.