It's an interesting combination of science and religion.

Kaku, a prominent physicist and an originator of the string theory, claims - not entirely seriously, I believe - that he has "proved" God's existence through the application of scientific methods.

I say not entirely seriously because even if he's right, "God" seems to be no more than synonym for wherever the universe came from, mathematical features and all.

And his God hypothesis is based on superstring theory and supersymmetry, which are in turn based on string theory. None of these concepts have been fully accepted by physics.

Since Kaku frequently appears on TV, it's also likely that he's exaggerating (or simplifying) the implications of superstuff for the sake of generating interest.

I'll leave to others the other questions I posed, whose evaluative answers require the application not of religious dogma but of inductive reasoning.