The God of the Bible pre dates every other God, because He created the world. Christ, as God, existed before the world began.
Hinduism and Buddhism don't even claim to believe in a God of creation, so how they can pre-date the Creator is beyond me!
In a sense, Judaism and Christianity commenced at the same time, but in the old testament they weren't two different religions. Only when Christ came was the distinction made. Now, they're two very different things.