Are they? There is Canon 11 of Quinisext Council, obligatory for all true christians and accepted at the time by Rome too:

Μηδεὶς τῶν ἐν ἱερατικῷ καταλεγομένων τάγματι, ἢ λαϊκός, τὰ παρὰ τῶν Ἰουδαίων ἄζυμα ἐσθιέτω, ἢ τούτοις προσοικειούσθω, ἢ ἐν νόσοις προσκαλείσθω, καὶ ἰατρείας παρ᾿ αὐτῶν λαμβανέτω, ἢ ἐν βαλανείοις τούτοις παντελῶς συλλουέσθω· εἰ δέ τις τοῦτο πράξαι ἐπιχειροίη, εἰ μὲν κληρικὸς εἴη, καθαιρείσθω· εἰ δὲ λαϊκός, ἀφοριζέσθω.

It is something like

Let no one enrolled in the sacerdotal list, or any layman, eat the unleavened wafers manufactured by the Jews, or in any way become familiar with the Jews or call them in case of sickness, or take any medicines from them, or even bathe with them in public bathing beaches or bathhouses. If anyone should attempt to do this, in case he is a clergyman, let him be deposed from office; or, in case he is a layman, let him be excommunicated.

Since latest Popes do everything that listed in that rule (may be with exception of bathing, but I'm no shure), that Popes should have been disposed long ago. If none of Popes was disposed for contacts with Jews, it is not a Christian church.

You are so uneducated, that it is completely unclear what do you do here? Demonstrating your lack of education on every topic you enter?