Religion isn't necessary. It's simply man's way of trying to solve the issue with their existence. Every man knows that there is an invisible hand moving things and making things to be the way they are and in that quest, they come up with ideologies which are passed down, generations to generations and then take as truth.

Religion is man trying to reach out to God but Christianity is the direct opposite of this. It's why I opine that christianity is not a religion. While religion sees men trying to contact, reach out to God, christianity is God reaching out to people, to the human race.

One can decide to ignore everything that looks religious and he would be right in his own eyes. What really matters is living life to the best of one's capacity and to the fullest of one's potential.