All religion proves there is a God.

Religion

It is clear that the dispersion, diffusion, and distortion of gospel truths has left fragments of the faith in various religions and cultures throughout the world. Many see in this an attempt by man to make his own god and religion in the absence of real ones. Rather than such similarities being evidence against the existence of God, however, these refracted truths bear witness of the initial wholeness which existed in the beginning with Adam. (A Wonderful Flood of Light, p. 20.) Neal A. Maxwell