He see's all of time at once, but who's concept of time is he able to see? Time is a man made concept, and if he see's time, as humans know time, then he has to be human, and humans are not infinite beings. Which would mean that god has to be finite, which would mean he can and does exists. But god as a finite being contradicts the definition of god.
Not saying I don't believe in god, but, it is fun playing with words to see how you can come up with contraticting stories and complex and mind bending thoughts that stretch you minds ability.