There is no latest time for a new religion. All religions start as a cult, and new cults spring up all the time. After that it's just a case of convincing a sufficient number of people that your cult has "THE TRUTH".
Why are these catholic organisations growing quickly? Is it mostly becouse of conversion or natural growth, by percentage?We sort of do already. The Sedevacantists, St. Pius X Society, and other “Traditional Catholic” are growing quickly in America, and quite a few of the members (I didn’t say all or even most) are just that “zealous.”
Do these modern "isms" have some sort of priesthoods?Perhaps you have the wrong angle here, limiting the field. Some people instead class the various -isms as religions, modern secular religions, with holy scriptures and condemned apostates and so on, and some of these creeds are very much alive, I think.
-As to what goes on in LDS Temples; yes. I've been through, or personally seen everything that happens in a Temple. It's not viewed as "secret" so much as "sacred". As such, yes. Anyone can find out what happens in there via google in less time than it takes to type it out. But I'm not going to talk about it. That being said, I WILL say that everything there is HIGHLY symbolic. As such, when taken out of context, it definitely would seem weird. But then, so to the rites of other Christians eating what they believe to be the literal flesh of someone, while bowing in front of an ancient torture device, with a bleeding body attached.
It's all about the symbolism.
This is your problem - most mainstream Christian churches regard adhering to the Nicene creed in particular as the absolute minimum standard required to qualify as Christian. There's an interesting article on the Vatican's website which, although confined to the narrow question of the validity of Mormon baptism, nevertheless sums up the situation as a whole.
Although the Vatican is at pains not to say so, when you consider this conclusion alongside that of the groups the church does consider can provide valid baptism - heretics, schismatics, pretty much anybody who accepts fundamental Trinitarian doctrine - I think the conclusion is fairly obvious, as far as the Catholic Church is concerned Mormons are not Christians (and I suspect most Protestant and Orthodox denominations would agree with the fundamental logic).
Incidentally, and on the subject of OP's post, I'm surprised nobody's mentioned the Nation of Islam yet. It was founded in the 1930's, has by some accounts at least as many followers as Scientology, and (in a similarity to the Mormons) whereas it claims to be Muslim this is a belief that is disputed by mainstream Islamic groups.
And then of course there are the less than serious religious groups, such as the Church of the Flying Spaghetti Monster and Jediism...
Among some circles Scientology seems as accepted (or unaccepted) as either Mormonism or Jehova's Witness.
L.Ron Hubbard (not to offend anyone) strikes me as a very 20th century Joseph Smith.
That would depend on which branch of Christianity they're looking at. If they're looking at the Catholic Church, they probably would think it's a pagan faith (no offense to the Catholic members here) with the veneration of saints in particular alarming them. They'd probably recognize more in a more "primitive" faith. Not sure which. It'd be really fascinating to find out thoughThe reality is that "all" religions are cults when they start. Some go on to expand and survive, others never make the jump from a cult to something that approaches the modern concept of a religion...Only time will tell for some of these. Don't forget, once a group begins to make the jump from cult to religion you can see a lot of changes in theology. After would the Christians of say 200 A.D. recognize most of modern Christianity - some would be there, but much would not.
That would depend on which branch of Christianity they're looking at. If they're looking at the Catholic Church, they probably would think it's a pagan faith (no offense to the Catholic members here) with the veneration of saints in particular alarming them. They'd probably recognize more in a more "primitive" faith. Not sure which. It'd be really fascinating to find out though
Why do you think that?I see the similarity, but I think modern Mormonism are a real religion, while Scientology only had the potential to become one, I expect Scientology will be dead or reduced to almost complete irrelevance in my lifetime.
Why do you think that?
Whatever people think about Mormon theology and Joseph Smith, no one will claim the Mormon leadership doesn't believe in what they preach (at least no honest person), and they don't exploit their members, at least not to any greater degree than all religions does.
Scientology is always talked about in these WI for some reason, but in reality they have a declining population of less than 40.000 members and virtually everyone who has a passing interesting on it knows about Xenu and their cultish behavior. I fully expect that when the most famous figures of the religion (Tom Cruise and John Travolta, I think?) fade into irrelevance, it will too.