I think that God in different religions and tradition is the same being, just people had different understanding and thinking who is God, based on their cultural and spiritual foundation and development.
In every culture and nation, in the time of need and despair, people was asking for spiritual help and guidance.
This never change.
Of course it has change, now when we are sick we go to the hospital where there is specialized people in health-care, we don't call the witch-doctor or a priest to pray away the disease...
That's because we are too stupid to realize that we don't know anything at all about our future, even one second into the future.
Think about Hiroshima and Nagasaki in WWII. People were walking down the street, others were in bed sleeping, some were at work... they were simply living life - fighting the war. Then BOOM, and they were merely shadows on the sidewalk.
Did those Japanese people even imagine that something like that could happen? They couldn't even believe it AFTER it happened! It was too big. They didn't know even one second into the future what would happen in their lives.
We aren't any different. Oh, we feel like we have some control over our lives. But the credit goes to God for giving us some stability. If the Japs had had the true God in their lives, Hiroshima and Nagasaki might not have happened.