Jesus Christ would not have come to teach us religion if we did not need religion. The need for the worship of God is necessary in our lives. We do need religion. Jesus Christ came to teach us religion because we need religion. The whole world is full of different kinds of religions. All these religions arise because there is need for religion.
There is need for religion. We need to return back to God. We need to be reconciled back to God. We need to come out of the sinful life we have found ourselves and get back to God. We need to receive the light that will guide us through life and lead us to God. We need the life which God is offering. We need religion.
There will not be a way of receiving salvation without religion. How will we know God? Who will save us and deliver us from the grip of sin if we don't get to God? This is why our salvation depends on religion.
Why there are fake religion in the world is because the devil knows that we have a need for God. He tries to mislead and give us falsehood. When we listen to the true doctrines of Jesus Christ and receive them, we will know the true religion.