https://episkopat.pl/doc/244797.Letter-from-the-Polish-Bishops-Conference-on-the-occasion-ofSaint John gives a clear answer in his First Letter: "WHOEVER DOES NOT LOVE REMAINS IN DEATH" (1 Jn 3:14). Let us note: the Word does not speak here only of hatred. It speaks of a "lack of love," and thus also of indifference, passivity, lack of concern, and callousness.
One such deadly deficiency of love was (and, unfortunately, still remains) ANTISEMITISM. Yet from this "death" the Lord has led us-and continues to lead us-especially over the past sixty years, through events that we feel obliged to recall to all.
It can be seen that our crime in this case is greater in us than in the Jews. As for them, according to the witness of the Apostle, 'None of the rulers of this age understood this; for if they had, they would not have crucified the Lord of glory'(1 Cor 2:8). (…) When we deny him by our deeds, we in some way seem to lay violent hands on him" (CCC 598).
In many towns-sometimes close to us, sometimes a little further away-there are synagogues that survived the ravages of war. In most of them, the joyful sound of Shabbat prayer no longer resounds. There are, however, some that are alive with religious life. Following in the footsteps of St. John Paul II, let us visit a synagogue on April 13. Let us remember the men and women whose prayers have permeated their walls for centuries. Where possible, let us meet with our Jewish sisters and brothers. Remembering that we always pray for them in the Good Friday liturgy, asking God that the people whom He first made His own may "grow in faithfulness to His covenant" and may "attain the fullness of redemption." For "the Jews are participants in God's salvation is theologically unquestionable, but how that can be possible without confessing Christ explicitly, is and remains an unfathomable divine mystery"
In 1997, speaking about the roots of anti-Semitism in Christian circles, St. John Paul II called the enduring existence of Israel a "supernatural fact."