One could even make the point that just as the Covenant of Sinai validated the Genesis narrative of Creation (since only G-d Himself actually witnessed those events), so the great slaughter is often used to vindicate the theory of ultimate meaninglessness and the completely random nature of creation. After all, people who believe in Meaning kill Jews; therefore belief in Meaning must be discouraged lest more Jews be killed. Never mind that these opponents of Meaning never seem to lack for motivation for any number of "progressive" moral/ethical crusades.
This is really a very interesting point. You seem to be saying (or implying) that the "historiographical use," as it were, of the Holocaust has been to recast Judaism as a system based, not on fear of G-d, but simply on fear. The result is that the development of indifference to religion, or even of generalized (rather than particular) hostility toward religion, is seen by some as being a positive development for Jewish people.