There is one simple word which answers your questions - FAITH. You either have or you do not have faith. Neither is better nor worse than the other because - even scientists will admit - no one on the face of the earth knows the answer.
The Russian Orthodox Church, like all religious groupings is 'man-made'. Inevitably politics and personalities play their part - the greatest upheaval in the Russian Orthodox Church was during the time of Patriarch Nikhon. Elements that broke apart then, remain splintered. Anyone wanting to learn the extent and reasons for this schism should endeavour to see Rimsky Korsakov's Khovanshina. This 5-Act opera spells that entire episode in Russian history with a remarkable brilliance. There was the split in the Roman Catholic Church which gave birth to Lutheranism and the founding of the Anglican Communion. My native church - the Church of Scotland - of the Presbyterian tradition, has been riven with breakaway groups, now reunited. Islam is no different - Shiites. Sunnis, Suffis and Ahmadiyya - again ALL man made. Buddhism isn't without its different denominations - Theravada, Mahayana and etc. Judaism also has its different sects. Each believe their way is the right way.
However, there is one common denominator amongst all the billions of people who follow an array of religions..... FAITH. Something which has no connection whatsoever with intelligence or education. Faith transcends all boundaries, all colour, all creeds. It defies description. Those who have it should be tolerant of those who don't. Those who don't, should be tolerant of those who do. It is life's ultimate question.