Oh, I don't discount the existence of life (even sentient life) from outside the realm of our perception. I don't know if it exists, but I can't say it
doesn't.
You can't prove a negative, after all.
No, what I discount is a Bronze Age fairy tale about a magical guy in the sky who created the world in six days and thinks people who don't sufficiently slob his knob should be condemned to a fiery torture pit for all eternity.
If an actual "god" exists, in the traditional sense of a transcendent being far beyond any human capacity to understand, it is certainly
not the God of the Bible, which has suspiciously human (and patriarchal, and racist) motivations.