Summary:
• If God is all-powerful, then multiple religions exist because God intends that—not because of human error or evil forces.
• Most people are born into their religion, yet many believe theirs is the only true religion out of thousands.
• Religions began as separate tribal belief systems and grew more diverse as societies expanded, interacted, and sometimes split over disagreements.
• Instead of rivals, religions can be understood as different viewpoints on the Divine — each offering part of the truth, but none of them expressing all of it.
• God is far greater than any single religion can describe; therefore, humankind needs many religions to better understand the Divine.
This question usually arises from two deeper concerns: Is the existence of multiple religions an insult against God? And if not, then why does humankind need so many religions?
If God is all-powerful and all-knowing, then God could have created a world with only one religion, one scripture, and one interpretation understood by everyone. If God wanted absolute religious uniformity, God has the wisdom and power to create that. We need to remember this.
Have you noticed how many people insist that nearly every religion on Earth is false, except for their own? Somehow, they found the only true religion among thousands. (And, typically, they were born into it. Imagine the odds.) Some people blame heretics and infidels for creating religions that are different from their own.
There is no good reason why God, all-powerful and all-loving, would allow demonic forces to create false religions to lure innocent people into committing unforgiveable sins—and likewise doom the children born into those religions. Many thousands of religions may not entirely agree with your own, but when a religion teaches love, compassion, charity, mercy, non-violence, and forgiveness, those teachings are not falsehoods.
Some people argue that free will gives you the choice to leave a supposedly false religion. That argument is true to an extent—yes, you can leave—but many believers may not fully understand the choice they have, especially if they have little or no formal education. Many believers may not sense that anything is wrong with the religion they were born into. There are people who live in societies where many religious freedoms are prohibited. For them, changing their religion is illegal.
Even free will has limitations, much like the human body has limitations. Bumblebees and spiders can see ultraviolet light, and snakes can see infrared light, but human eyes cannot see ultraviolet light or infrared light. Dogs can hear sound frequencies that human ears cannot hear. Some ideas exist today that we can understand but our ancestors could not. In the future there will be new ideas that our descendants will understand but we, today, cannot imagine.
If God is all-powerful, then God is wise enough to devise a way to physically limit our free will without us noticing how limited our free will is. If God is appalled by false religions, then God could keep us ignorant of all spiritual paths except the correct path. That Divine fix would solve many problems on Earth. No religious disagreements would exist. No religious wars would exist. Yet, who is to blame for religious wars? Multiple religions? Or the people waging wars over those religions?
God never makes mistakes. That means multiple religions exist because God wants them to exist. Instead of complaining that there are so many different religions, we should ponder why that is so.
Thousands of years ago, human societies were tribal. Each tribe developed its own beliefs, stories, and rituals, usually in isolation. Many different people contributed ideas. Many religions teach stories about why we exist, how the world works, and what behaviors are considered worthy of respect. As tribes grew into communities, nations, and empires, some religions gained more believers than others, but the religions remained diverse. Additional ideas, some from different lands or different times in history, were gradually added and increased the variety.
Even within a single religion, devout and knowledgeable believers sometimes disagree about scriptures, or rituals, or moral teachings. If their different opinions cannot compromise, the religion may split, which is called a schism, creating new denominations and sects. Variety further increases.
Religions also influence one another. When the Roman Empire ruled much of Europe and the Middle East, the Romans believed that their Gods were the same Gods worshipped by other peoples, but by different names. For example, the God whom the Romans called Jupiter, the Greeks called Zeus and the Egyptians called Ra. Egyptian tombs from that era show Roman, Greek, and Egyptian Gods intermixed together. This mixing of religions was considered a form of respect.
These are some of the social and geographical reasons why multiple religions exist. But why would God want multiple religions?
Instead of assuming that all religions must be rivals, they can be treated as multiple perspectives on the Divine. Each religion offers its own understanding of the Divine, rich with insights and focused on what that religion considers to be most important. Yet, that focus means that every religion is also limited to some extent. Every religion can express the fullness of its own perspective, but no religion can express the fullness of every perspective. No single religion can express the fullness of the Divine.
Imagine a vast puzzle whose pieces are not assembled. The assembled puzzle might present a truly magnificent picture, but we cannot fully comprehend it if we cannot fully see it. Imagine that each religion on Earth is one piece of the puzzle. The largest religions are the biggest pieces, and each of those pieces is so beautiful that we might not feel a need to see anything more. But every piece is important, indeed essential, because the great picture is not complete without each and every piece. If you look closely at the biggest pieces, at the largest religions, you may see that they consist of many smaller pieces: sects, denominations, other versions of the same religion. The variety within each religion is wondrous. The total variety revealed by the great picture would be even more wondrous. More wondrous than any single religion can teach alone.
Most religions agree that God is beyond our full understanding. Many near-death experiencers report this as well. Humankind has multiple religions because we need them, because God cannot be confined within a single religion. If we strive to learn the countless perspectives offered by our many religions, then perhaps we can get a little closer to better knowing the Divine.