How long can the Holocaust be used to generate sympathy?

Israeli commentator Eitan Haber has a word of warning to fellow Jews:

We thought we deserve everything, after the Holocaust and the six million dead. The world was silent while our grandparents were being burned? Well, the world shall pay. We deserve everything. Yet how come we didn’t realize that one of these days, the memory of the Holocaust will nearly evaporate in the world’s political corridors?