Crucifiers of Christ ought to be held in continual subjection. ~ Pope Innocent III
The Gentiles ... have attained to justice, even to the justice is of the faith. But Israel ... has not come unto the law of justice. Why so? Because they sought it not by faith... For they stumbled at the Stumbling Stone.
~ Romans ix.30-32
Many shall come from the East and West and sit down with Abraham and Isaac and Jacob in the kingdom of Heaven, but the children of the kingdom shall be cast out into the exterior darkness: there shall be weeping and gnashing of teeth.
~ St. Matthew viii.11-12
The Jewish people fell from the heights because of their faithlessness and condemned their Redeemer to a shameful death. Their godlessness has assumed such forms that, for the salvation of our own people, it becomes necessary to prevent their disease. Besides usury, through which Jews everywhere have sucked dry the property of impoverished Christians, they are accomplices of thieves and robbers; and the most damaging aspect of the matter is that they allure the unsuspecting through magical incantations, superstition, and witchcraft to the Synagogue of Satan and boast of being able to predict the future. We have carefully investigated how this revolting sect abuses the name of Christ and how harmful they are to those whose life is threatened by their deceit. On account of these and other serious matters, and because of the gravity of their crimes which increase day to day more and more, We order that, within 90 days, all Jews in our entire earthly realm of justice -- in all towns, districts, and places -- must depart these regions.
~ Pope St. Pius V (From his Bull, "The Jewish Race," Feb.26, 1569; PAC, p.648).
“To judaize, namely to observe Saturday, or other Jewish ceremonies, is mortal [sin]: because that pertains to the superstition of a false divine cult, according to Cajetan, in his summa. If however one observes Saturday, not for the purposes of a Jewish rite, but for some other pious reason, such as to venerate the Blessed Virgin Mary, he would not sin mortally.
To converse with Jews is forbidden at Canon Law, in many places in the capitular De Judaeis etc. 28 q. 1 Capitular Nullus, etc and all of them regarding assiduous, and familiar conversation, due to the danger of subversion, and especially in ten cases is it forbidden:
First, to live with them;
Second, to eat with them;
Third, to bathe with them;
Fourth, to call upon them for medical care;
Fifth, to accept their medicine;
Sixth, to feed their children in their houses;
Seven, to serve them, as employees;
Eight, to be their slaves;
Nine, for them to hold public office amongst Christians;
Ten, to eat their azyme [matzo]. To tolerate them in public office is mortal, because this disparages the dignity of the Christian Faith, and for that reason is it forbidden.
The same, because this would cause too great a familiarity, and consequently a danger of subversion, as supra. I say the same for the consumption of their azyme. To do all of that is mortal. To eat food with them when one has a choice is never permitted, apart from extreme necessity.”
~ Fra Bartolomeo Fumo, O.P., Inquisitor General for the Duchies of Parma and Piacenza, +1542 A.D. (Citation from the medieval Inquistor’s manual explaining what can and cannot be done vis-à-vis Jews, based on the canonical legislation promulgated by Pope Gregory IX in A.D. 1234, in the capitular “De Judaeis” [Of the Jews].)