Why I became non-Buddhist and a non-believer of the concept God?

Though I was born in an ethnic titled "Tamang" that is considered Buddhist in Nepal culturally as well as ideological belief system wise like individual or family, who follow Hinduism ideological belief system considered Hindu, Christianity culture and belief system follower considered Christian and Islam culture and belief system follower considered Muslim by birth. In my understanding fact, by birth everyone is born as an atheist with clean and clear mind but family members and society made innocent and ignorant child theist imposing parental dogma on them during process of socialisation. I realised this is the first crime any parent can do and has been doing against humanity indoctrinating theological dogma to their innocent and ignorant child's mind without any intention instead due to lack of their own ignorance and delusion. Any parent who wants their child better and bright future no child should be made any theological dogmatic but family members and society do so indoctrinating parental belief system from the very early stage of socialisation process. In the same way, I also became a Buddhist by birth without knowing what actually Buddha, Buddhism and Buddhist mean. 
However, I decided not to be a dogmatic theological believer since my youthful adolescent age became I used to question to myself why we have to do ritualistic worshipping activities in daily basis and also time-to-time why we have to invite Buddhist religious leader known as Lama to do worshipping activities requesting them to read different purposeful holy scriptures section which my mothers used to do so. By doing so we had to respect them as a holy-man, pay remuneration of their ritualistic service and also provide special foods and drinks to those Lamas, that were indigestible to me. Therefore, I used to question to myself why we had to do this, how about those family members who can afford to do so and provide such luxurious treatment to those Lamas. Besides, on the day of a prince Siddhartha Gautam Buddha was born, which is called Buddha Jyanti I noticed that animal scarification ritualistic activities are performing every year which was very much indigestible to my youthful mind. These made to think differently and decided to not to be a religious person unless and until I don't understand why such religious activities have been carried out and why God not just Buddha but else are not helping poor, ill and sick people. I also decided not to worship any God visiting temples and monasteries and put red colour religious symbol called "Tika" on my forehead. This is because in the context of Nepal and Indian societies especially in domination of Hindu cultural practice it is considered the symbol of religious person if any put red colour "Tika" on their forehead. Because of my such attitude and behaviour my network friends used to ask me whether I am an atheist or Christian. I even didn't know what atheist mean by then so I used to object them saying I am not a Christian but I don't trust and believe on any religious worship and ritualistic activities.