Which Religions Tend To Be Organized Religions And Why?

Catholism and Islam are both organised while Hinduism is not

Towards the Elimination of Religious Prejudicehttp://74.125.47.132/custom?q=cache:wse1…
This paper is offered as a contribution to the Christian community from an individual Baha’i perspective. Its focus is upon the positive and negative possibilities facing Christianity in response to contexts such as September 11th, towards the witnessing of a Christian Faith free from religious prejudice.
This paper is also informed by my reading of a recent letter from the world governing body of the Baha’i Faith, The Universal House of Justice, entitled “To the World’s Religious Leaders”. This letter was written in April 2002, and invites religious leaders of all Faiths to engage in eliminating religious prejudice and cautions that religious leaders have the powerful potential to either incite or mitigate a potential global conflagration that such religious prejudice contributes to. Discussions of the catalytic role that religious leaders play in the realm of inter-religious dialogue have not often been the subject of examination in this field and therefore it is hoped that this paper offers a useful focus on a subject infrequently discussed within Christian studies.
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Humanity can simply not afford another Crusades or a Thirty Year War. Our destructive capacity is so much more effective now, that the very survival of humanity is threatened by the large-scale maintenance of religious prejudice.
This wisdom is not merely the result of an exercise in philosophical or ethical discourse, but rather the hard practical lesson of experienced horrors that find their cause in other prejudices such as racism, sexism and nationalism. Ethnic cleansing, racial enslavement, absolute national sovereignty leading to world wars, systemic female infanticide: credible theoretical justification of these prejudices are no longer possible in the majority of the thinking world. How is it possible that we can still contemplate the legitimacy of religious prejudice? Have not the lessons of history in this regard been equally horrific so as to bring us out of the prison walls of this prejudice as well? To quote from the letter of the Universal House of Justice:
“So fundamental a reorientation religious leadership appears, for the most part, unable to undertake. Other segments of society embrace the implications of the oneness of humankind…Yet, the greater part of organized religion stands paralyzed at the threshold of the future, gripped in those very dogmas and claims of privileged access to truth that have been responsible for creating some of the most bitter conflicts dividing the earth’s inhabitants.”5
The great disparity of wealth and poverty, education and health that currently exist helps foment a culture of terrorism and war that is made possible by objectifying entire masses of people of differing faiths and cultures as having no intrinsic spiritual value. If from a young age, we believed that we were truly one family, we would not feel comfortable living in relative luxury while our sisters and brothers starved or died of preventable diseases, or couldn’t pursue the basic pre-requisites for happiness that most of us in the West currently take for granted.
The history of wars shows us that their causes are often complex, yet the contribution of religious prejudice cannot be overlooked.
Ireland – Catholic vs. Protestant
Israel – Jew vs. Muslim,
Sri Lanka – Hindu (Tamils) vs. Buddhist (Sinahlese)
Kosovo – Christian (Serbian) vs. Muslim (Albanian)
Iraq and current “war against terrorism” – Muslim vs. Christian
Strangely, there is a clear gap in the international community in acknowledging the importance that religion possesses in its capacity to facilitate both war and peace.
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TO THE WORLD’S RELIGIOUS LEADERShttp://info.bahai.org/pdf/letter_april20…
The enduring legacy of the twentieth century is that it compelled the peoples of the world to begin seeing themselves as the members of a single human race, and the earth as that race’s common homeland. Despite the continuing conflict and violence that darken the horizon, prejudices that once seemed inherent in the nature of the human species are everywhere giving way. Down with them come barriers that long divided the family of man into a Babel of incoherent identities of cultural, ethnic or national origin. That so fundamental a change could occur in so brief a period—virtually overnight in the perspective of historical time—suggests the magnitude of the possibilities for the future.
Tragically, organized religion, whose very reason for being entails service to the cause of brotherhood and peace, behaves all too frequently as one of the most formidable obstacles in the path; to cite a particular painful fact, it has long lent its credib

the catholic church has been very organized / your question needs to be more specific/ I think you attempting to discredit a belief as false because they are “organized”

no religions are organised anymore, because they can’t keep in contact with all the people who believe in that religion.

The only example i cant think of a disorganized religion is Discordianism.