We get 3 dimensional personality from 3 dimensional space? And, from
this, we can deduce God?

Oh sure - it's a terrible argument alright! I'd rather have Kant than
George when it comes to philosophy!

Kant doesn't talk about "God" but he does explain that space/time does not exist in our percepts but is, instead, necessary for them.

It's interesting that Kant & early-Wittgenstein both end up saying
something similar in relation to general concepts like "Space", "Time",
"Colour" and so on.

I'd forgotten all that stuff about "The manifold"! Ah! Quite takes me
back!