"The memory and condemnation of that horrible extermination of millions of people...may help everybody to not forget that the logic of hatred and violence can never be justified," he said during his Wednesday weekly audience.
"Let us not get tired of praying for peace, for conflicts to end, for weapons to stop, for relief for exhausted populations," Francis added.
The leader of the world's more than 1.35 billion Roman Catholics mentioned the ongoing Israeli-Palestinian conflict and the bombing of civilians in "martyred Ukraine".
He repeated his assertion that "war is always a defeat" in which "the only winners, so to speak, are weapons manufacturers".
(Reporting by Alvise Armellini, editing by Angus MacSwan)
