Falling Into Metaphysics

Heidegger, The Word of Nietzsche:

Every metaphysics of metaphysics, and every logic of philosophy, that in any way whatever attempts to climb beyond metaphysics falls back most surely beneath metaphysics, without knowing where, precisely in doing so, it has fallen.

It would be nice to know if Heidegger is intentionally alluding to the sense of "falling" in Being and Time, and whether he is suggesting that as we fall into the They (the social world), in flight from dread and death and the frightening sense of our own being-in-the-world, we also fall into metaphysics? As Heidegger says "That dread is dread in the face of dread." If so, it would seem that being-toward-death itself becomes a means to recollecting Being. Also, with regard to the famous "God is dead" section from The Gay Science:

Perhaps we will no longer pass by so quickly without hearing what is said at the beginning of the passage that has been elucidated: that the madman "cried incessantly: I seek God! I seek God!"

Funny how often I myself have passed over these lines. What do they mean? Heidegger suggests that God dies because the people have forgotten Being in their metaphysical "idle babble." On this one thing I find myself almost always in agreement with Heidegger, for whom philosophy and thinking itself should become a humbling of oneself before God. And so the question, which retains all of its religious weight I think, is simply: where have we fallen?