I’ll give you a different take than some of the others…
Even if I was atheist, I would still be Christian. Why?
Having lived in Asia, on a very religious island full of Muslims, Hindus, and Bhudists, I can tell you that Christianity is orders of magnitude higher in terms of humanity and civilization.
Growing up in the US, I thought concepts like charity, equality, generosity, random acts of kindness, humility, civility, community responsibility, love of neighbor, service to mankind, etc were just human nature. Living here in Asia, I have found out that these concepts are not human nature, but are infact the legacy of a country build on Judeo-Christian values. In Asia, the hierarchical culture insills a prevelance of a Me First, Win-Lose, Rich are Powerful, Poor are servants at the mercy of their employers, who can be cruel, employees are at the mercy of their bosses, woman at the mercy of their husbands. Parents actually use their children for financial profit. Widows are actually forced to live a life of isolation, and neglect. Orphans are left to beg on the street, the thinking is that any person born into a bad situation is paying for evil done in a previous life, so there is no motivation to help someone in need.
I am shocked and saddened at the human condition without the guidance of the Christian philosophy. “Love God above all else” - makes us humble, “Love your neighbor as your self” - makes us fair and kind. Jesus Christ, even if you don’t believe was the Son of God, you must know he was a philosophical genius.
What did religion do for your grandparents? It gave them guidance to make wise and proper choices with their life. It helped them live a life that they could look back upon and be proud of. When they were within seconds of their death, they could remember the life they lived, and die at peace…they were good people, they loved others and tried to help, they led a good and decent life.
And, since they weren’t atheist, they could also die with the knowledge and peace that they would be living an eternity in paradise with their heavenly father.