I think you've got a very rosy view of religions in general. How do you reconcile universal kinship with the clash of civilisations manifested by Islam and Christianity? This shows that religions tend to follow tribal impulses, they create strong bonds within group but divisions between groups. Religious beliefs are a barrier to universal kinship, something we now need to overcome as we need to see ourselves as global citizens, human beings, rather than just christians or muslims or Indians or Chelsea supporters.
Unfortunately that has become true. What often has started as a simple teaching, has attracted those who have seen it as a way to exercise power over others and collective self centeredness has developed as a result. This invites conflict with those of a different persuasion. There have been attempts in the past to try to establish what is common to all established religions and focus on what might unify them rather than divide them but with little apparent success. I think 'Perennial Philosophy' was one such attempt, which might appeal to some individuals but is no match for an established emotional mass mind. The Chelsea and Millwall supporters of the religious status quo are unlikely to transform. It is probably the same driving force which allows a human being to use scientific method to develop Novichok, mustard gas, nuclear weapons etc. It is human nature which needs to transform on a mass scale but I don't see this happening with the world population expanding as rapidly as it is. Even when the world population was smaller in the days of Lao Tse, his verse in the Tao Te Ching probably fell on deaf ears.....
In a small country with few people
Even though mechanisation abounds,
The people do not need it.
Let them live as if death is imminent.
Though transportation be available they would not travel;
Though weaponry existed, it would not be used;
Simple communication would replace writing;
Food would be satisfying;
Clothing and accommodation would be comfortable.
They would be happy with their way of living.
Though they live within view and earshot of neighbouring countries,
They would not be tempted to travel there throughout their lives.