The deportation of whole populations will be the lasting legacy of this war, having been practiced by all sides in the conflict.
Indeed, this particular Vatican newspaper editorial comes from neutral Switzerland, and it strikes me that nothing in it applies specifically to Nazi atrocities.
Clearly the Vatican wished to appear, dare I say it?, "fair and balanced" in condemning behavior practiced by both Nazis and Communists.
Might I suggest that extermination of Jews did not fit into their "both sides do it" template, and so was never specifically mentioned?