Of course you can.
You can start a Church and preach and pray to kill the President of the US and to kill all gays, you can also start a Church and tell your adherents to kill themselves, not have children, have abortions to save the planet. You are also permitted to have a Church or religion that teaches its adherents that they should kill themselves so they can be taken up to space by alien gods (remember Heaven's Gate?). Then of course is the Creativity Religious Organisation/Movement which teaches, preaches and adheres to white supremacy. My favourite in the moronic and obscene religions allowed under the guise of "religious freedom" is "The Body".. If any should be put on the list to be flung by way of giant catapult into the burning sun, it is these folks.
In short, yes, you can just start a Church and preach anything you like whatsoever. Keep in mind that if you end up starving children to death, such as in the case of "The Body", and the authorities find out about it, you may be prosecuted. But so long as no one is hurt, you are free to preach what you like. It should also be noted that even if you do preach crap and others are hurt, more often than not, you can continue on preaching and the religious organisation you founded will not be banned.
So then why doesn't everyone declare their institution to be a church so they can say whatever crazy horseshit they like and not have to pay taxes? Why can't Charlie Hebdo be a religion too, based on a divine creator who enjoys offensive cartoons and therefore made it physically possible to draw them? Seems to me you're still expected to pray at the feet of one of the established gods, or else have massive legal teams and influential power brokers in Hollywood like the Scientologists. The examples you cite don't cut it, because the Heaven's Gate religion would have been closed down if authorities had known what they were preaching. Established religions are allowed to openly demonize non-adherents and promote ideas like ignoring all Earthly responsibilities while waiting for God to come down and clean up their stool for them, all without penalty as I'm sure you're aware. I want to see more examples of non-conventional religions being allowed the same degree of leeway, being allowed to tell their followers to avoid food or medical treatment and getting away with it.
The problem is that if I tell people to do something recklessly irresponsible and it's not in the name of Jesus, Mohammed, Moses or Xenu, my government is highly likely to deem my claims of religious conviction to be either fraud or deserving of psychiatric intervention. Anyhow my point is that the separation of church and state should no longer be accepted as a defense for preaching harmful bullcrap, such as the nonsense that ultimately encourages radicalized Muslims to employ violence against those who offend them. Temples aren't autonomous territories; you don't stop being a human being and a citizen of your society the moment you step inside.
I don't disagree with you. This should apply to all religions. Which is why schools and colleges like Patrick Henry College (subject of the "God's Next Army" documentary which is enough to keep sane people up at night), radical Jewish and Islamic schools which preach and teach religious hatred should be closed down. I also believe that home schooling programs should not be allowed to allow parents to turn their children into intellectual retards who believe in Adam and Eve (as was evidenced in the Jesus Camp documentary).
Hear, hear.
I find a good long cane is more than sufficient to teach... ermm.. to encourage children become servants. And selling them on weekends for cash is only really acceptable in certain societies. I believe some areas of Thailand have a tourism industry based on just that.
Great, so then there's no need to teach children about hell until they're of an age where they can think about it critically for themselves and challenge the authorities who attempt to abuse them with it.
You mean multiculturalism?
No, I mean a perpetually lagging centrally-planned economy and a bloated bureaucracy that attempts to intrusively steer the nation's culture and way of life. Looks like no one has yet figured out where the Paris ghettos fit into that picture, but I'm sure they've got some plan for resolving it without humiliating themselves in front of ze Americans.
I would argue that France needs to do more to protect all of its citizens equally. Regardless of religious orientation. One is no more or no less important than the other.
So then there should be an end to religious incitement altogether, and all the temples engaging in it to even the slightest degree should be shut down instead of slapped on the wrist. It should be outright criminal to traumatize children and stifle dissent through threats of violence and eternal punishment, or to intentionally deprive them of chances to integrate into the society at large.
We need to start monitoring and controlling the messages coming from religious institutions, or else we have no business controlling secular institutions either.