In your opinion what causes christians to believe in Jesus

[Thumpalumpacus]

Precisely, Newtonian physics describes gravity as a force between two objects and Relativity describes gravity as a curvature in spacetime. Both describe and predict the same phenomenon, but it would be nonsensical to say they both determine the phenomenon.

Relativity is actually an add-on to Newtonian physics. We humans use the latter for slinging spacecraft around the solar system, and the former for analyzing things like how light is affected passing through a gravitational field or how atoms behave under pressure. Newtonian physics is really a subset of relativity, as the latter is a more-comprehensive description of what we see.

It's not that Newton was wrong, it's that his formulation was incomplete in describing the Universe, as what we saw became more detailed. As data was gathered and added to the dataset, Faraday and more importantly Einstein saw that our descriptive formulation had too much wiggle-room. Saying both Newton and Einstein describe the same phenomena isn't really accurate. Newton describes a subset of relativistic physics.