Irish priest Denis Flaherty made a career out of attacking Jews as the origin of "naturalism"(???) and once wrote an anti-Zionist book entitled An Unholy People in the Holy Land. He remains a hero to many right wing Catholics and his books are easily available.
Another rabidly anti-Jewish priest was Fr. Leonard Feeney (father of "Feeneyism"), whose St. Benedict Center still publishes and posts anti-Jewish material, including a little gem entitled "The Chosen People is Now the Accursed Race."
As much as I sympathize with pre-VII Catholicism I have never been under any illusions of their feelings about Jews and Israel. In addition to the above figures from the past the Society of St. Pius X, Gerry Matatics(sp?), and Robert Sungenis are also believers in a Jewish conspiracy. Right wing Catholics seem to assign the role `Amaleq plays in Judaism to `Am Yisra'el even as they usurp the role of "chosen people" for themselves.
Not all Catholics. I am still on the side of the Jews. Of course as my country is going down the drain so is my Church.
Some say that Israel is now Babylon, due to the talmud having been compiled there. I don't believe that. But as a Catholic I do believe that the Catholic Church is the new Israel, the Israel of the New Covenant. If one believes in the divinity of Jesus Christ, it isn't a "usurpation" but a simple fulfilment of the law, the old made new. The Temple veil was torn when Jesus died for a reason, after all.