It is not that simple. The late psychologist Carl Jung developed a theory of the archetypes of the collective unconscious. In modern lingo, these would be like subroutines connected to the brain's operating system; apps. His thesis suggested that these archetypes were common to all humans, independent of culture, and therefore define humans as a species; human nature. These are connected to our human DNA and how the human brain's firmware is organized for needs of human consciousness.
In his day, most of psychology was connect to the ego, which makes us unique. Jungian Psychology was more about human nature which is the same for all.
To prove his thesis Jung studied collective human symbolism from the world's modern and ancient religions, alchemy, the arts, etc to see if he could find patterns of commonality over time and space. He also looked for cultures that never met to see if their mythology developed in parallel, even without contact. For example the Aborigine of Australia which are very ancient people; 50,000 years, also have a world flood mythology even though isolated from the West. This particular aspect of the research suggested the collective unconscious has a role in developing parallel religions even in isolation.
What Jung found was these archetype apps of the brain were common to all humans, all through recorded history. This suggested that the base foundations for all religions come from the same place; brain's operating system. These system have been superficially modified by the ego and the culture in which they evolve, to reflect parallel cultural needs. Norse and Greek gods had different names and clothing but the overall structure is similar. Each surface reflects the local needs.
The affect is similar to all automobiles having four wheels and a drive train, with cultures adjusting the body styles onto this common base. The various religions tend to be optimized to the secular needs of different cultures as well as to the archetypes. If you live where there is snow all the time, the four tires will be snow tires but still four tires. The question of which is the best, is more in the context of different cultural needs, since each system is optimized for two sets of needs; inner self and the ego/super ego.
For example, Atheism is a movement connected to Christianity. That contrary mind set is allowable, due to the forgiveness of sins. One cannot outwardly deny god in all religions, since some doctrines are not as flexible to blaspheme. Forgiveness of sins is also what helps make the West more creative since being a pioneer often places you in conflict with the status quo, but since this sin will be forgiven when all is done, it is more allowable.
When the US Constitution made provision for the freedom of religion; First Amendment, it was placing the archetypes of the collective unconscious first; common human nature. The world wide migration to the open lands of US, was about our collective human nature being able to work together in spite of the superficial differences of the world's religions. We all come from the same deeper source.