To people like these priests, the tragedy of the Holocaust was that it was discovered and exposed to the world — not that it happened in the first place.

Their preferred outcome would have been that the Jews were all killed, and done so in secret, and the fact was never revealed or mentioned again.

But given that the mass killing was discovered and revealed to the world by liberating U.S. (and Soviet) troops, the fallback position is that there never was any killing at all.

The goal is to suppress any awareness of the previous Holocaust, so that the next one can be ennacted more successfully — i.e. without any publicity.