There MUST be a God. Has to be a first cause.
I admit its an assumption but I assume God has some interest in humanity. There would most likely be some evidence of this interest in the early dawning of human history. In other words no religion incapable of showing roots, if not foundational components at least a few thousand years old would be valid.
Since we are assuming God contacted man thousands of years ago and did so in a significant manner we have only two possibilities to consider as late comers are out and aboriginal cults come and go like the falling leaves over the millenia . Hindu and Hebrew and their refinements are the only real choices.
So you can be a Hindu, a Hebrew, a Buddhist, a Christian, an agnostic or an atheist. Anything else is stupid.
Personally christianity makes the most sense of all of em and it offers the best deal.
The best deal?