In my time prior to coming into contact with Krishna Consiousness in 2011, I got disappointed in Hindu, Hinduism, Hindu-dharma or whatever you want to call these caste-ridden sense gratifyers. I looked into Atheism, Christianity, Indology and also Islam. I got confused because of the diverse sub-sects in all these groups who call themselves religions who are supposed to represent the teachings of the messengers of God.
When coming into contact with Krishna Consciousness, I discovered why there are diverse "religions". It is all about time and place as well as the propensity of people to satisfy their senses. People should satisfy Krishna's senses by following the order of the Guru, His Divine Grace A.C. Bhaktivedanta Svami Srila Prabhupada.
After his departure in 1977, his so-called followers proclaimed themselves the succesor Guru's. As you can see with ISKCON (GBC) today, this has failed miserably. After the prophet/messenger/guru of the Supreme Godhead disappears from material vision, the so-called followers usurp the movement and proclaim themselves as succesors and leaders of society, all in the name of the prophet/messenger/guru without actually following and propagating the message: Love of Godhead, come back home, back to Godhead through religious principles. These so-called followers even have the audacity the kill those who speak out against them. How can you speak out? By knowing the scriptures yourself. You will easily see who deviates and who does not.
This happens in all religious groups. This happened in Judaism, Christianity, so-called hodgepodge Hinduism, Buddhism, ISKCON, you name a religious group and you have diverse sub-sects. Why? Because the so-called followers and the new leaders live a life of sense gratification in the name of God and his prophet/messenger/guru. This will lead to the fact that the movement will fail. The innocent public, the people, the workers will be mislead and even mistreated as history has proven time and time again. This also will lead people to Atheism. This is why people who are leaders like spiritual masters, fathers, kings, soldiers, businessmen, managers and others in leadership positions hava a huge responsibility to protect and guide humans whom they are supposed to be leading. Now however, after the prophet/messenger/guru disappears, most of the followers and leaders do not take this responsibility and care only for themselves and direct familymembers and friends. Still no worries, God sees everything and will fix it in the future by sending new messengers. This is called priestcraft and you can read all about it here.
In the Islamic world, this same thing has happened. Have a look at the 5 part documentary by CaspianReport. Listen carefully how the person narrating the History of Islam explains what actually happened. Sadly, this is the explanation of the division in the Umma, the Islamic World, between Sunnis and Shias. This also explains why there are diverse Muslim factions fighting eachother. And finally this explains that after the last Islamic Empire (Ottomans), the region is now known as the Middle-East and why there is only war there. Very sad indeed. This is the result of using God, His rules and His creation and especially His messenger's message for sense-gratification which results only in destruction. The Islamic world is an example of it. I do not believe that Prophet Muhammad said that Muslims should fight eachother like they are doing now.
I used to be a BJP-RSS-VHP follower and called myself a Hindu. Needless to say, I was not a very big fan of Islam and Muslims. This changed however after going through the history of Islam and why and how Islam arose. One of the very important explanation of Islam for me was that Muslims believe in One God, not many like Hindus do. Also, God is Great, everything happens with his sanction, then how come Muslims conquered the entire Middle-east, knocked at the door of the Austrian Empire's capital and conquered our beloved India and ruled her for 1000 years? We must stop relating and associating with the body! We are souls. There is a story behind all this. It is neatly explained by the Brahma-Madhva-Gaudiya-Vaisnava Sampradaya acarya's of which His Divine Grace A.C. Bhaktivedanta Svami Srila Prabhupada is the last acarya. He came to the western countries which are filled with impersonalism and voidism in the 60s to explain to us this story.
Hare Krishna!