The Islamic belief is the only correct solution to Man's fundamental problem

Part 1 - What do you believe in?

In the West, people call themselves Christian, Protestant, Catholic, Church of England or whatever, and they follow the traditions derived from that such as Easter and Christmas. But very few people seriously believe in the Christian doctrine:

God created Adam and Eve, and placed them in Paradise.
Adam and Eve disobeyed His orders, and therefore God expelled them from Paradise and placed them on Earth in a state of sin.
Every subsequent generation inherited this sin from Adam and Eve, and thus will be consigned to Hell in the next life.
Christ is the Son of God, who was born to Mary, and who died on the cross as expiation for the original sin of Adam and Eve.

This is much the same most societies. For example, in India, most people call themselves Hindus, but this is more of a label rather than an actual belief or a way of life. While most Hindus follow the Hindu festivals and celebrations, few really believe in the Hindu texts, believe in a God called Ram, or a God with an elephant's head and a human body called Ganesh.

Everyone has problems: everyone faces the need to feed himself, clothe himself, have shelter from the elements, form relationships with others, etc. But before you can begin to think about how to solve them, every man and every woman must carry a thought about what came before this life, the purpose of life, and the relationship between this life and the next life, if any.

And you'll find that from the beginning of time, Man has searched for answers to these questions, because Man cannot evaluate or formulate a meaning for what he does in this life without having an understanding of what the purpose of life is.

You will find that there will be not even a single person who has managed to escape from answering the question of why we are here.