Myself exist in a religion. But i am not intrested in any of them. So as per record i am in one religion. So many people just for money or physical happiness join some religion. But they contuinue their own religion. So do you people beleive in these religion sense!
Reference link

I'd first have to read a cogent question, so as to proffer an answer. Further, you have one too many "HTTP" in that link, which means we can't even look at anything to clue us in to what you're saying.

I'm sorry, I don't understand the question.

Oh, by the way, this is the link that he means:
http://www.adherents.com/Religions_By_Adherents.html


It's not difficult for me to believe that Christianity is the highest ranking religion, it has been a widely popular belief for a very long time. Not only are most Christians very stubborn in their belief system, but are incredibly good at persuading others to follow their sector of belief. For this reason, their children are also heavily influenced, generation after generation.
While other religions have a tendency of being more flexible in their faith (Hinduism, Buddhism..), more people fall in and out of them freely without guilt or consideration towards offending any one particular God. In Christianity, it is a literal sin to go against any other deity.

I'm sorry if that's not what you were inquiring to.

sorry for my wrong link. now corrected. My question is any religion you take there is lot of sub caste in that religion itself.. example christian have so many sub caste. In catholic and there will be so many sub caste. Why this many caste. These all people have their beleif in same god. but different beleif. If other god is sin. Then for one god why so many caste and religion. The main reason all human are narrow mind. If we are not upto their point. They will create a new caste and follow their beleif. Only once if we take the caste away it become one religion, then only you can think about uniting other religion and one god.

Edit

Welcome Love marriage

To answer you in a simplistic fashion, there are many sub-categories of religions because the world has always been divided on the subject of faith. When the first bits and pieces of man began sprouting up on Earth's surface and migrating from their homes, building cities and creating language, it was also not uncommon for these beings to come across things in nature that proved allusive and perhaps even foreboding. Because of an inherent fear that humans have to fear what cannot be explained, these things were worshipped to avoid wrath of any kind.
Eventually, these beliefs formed fully, were spread and evolved into religions that for the most part, are still existent to this day.
With Christianity, Catholicism followed, breeding branches of those who did not wish to oblige to that specific area of faith, but rather begin their own, and so forth. It is true that Christians all have one common ground, involving Jesus being the speculated son of God, although their ways of lives differentiate.
There have been wars amongst these sectors for many years because of this, that still continue today. It cannot be answered as to why these religions will not simply come together over tea and biscuits, and I cannot suggest any other reason besides simple pride and the idea of ancestry.