“Completed Jew” or “perfected Jew” would probably have offended the ADL equally. They both indicate a lack of something, and, sadly, most modern Jews are no longer looking for the Messiah. No longer seeking Him, they look to social justice programs and charity to provide completion, frequently including pro-abortion causes. Like most secularists, they deny that they lack anything. (The Orthodox Jews are different, but they are no longer the majority in the Jewish community.)
Also, I heard Scott Hahn mention on an EWTN series that historians generally agree that most Jews did become Christians. The pre-Christian census and the first few post-crucifixtion censuses show a sharp decline (about 90%) in the numbers of Jews in the Roman Empire, only partially explained by the scattering of the Jews out of Palestine after the destruction of the Second Temple in the late first century.
Unfortunately, I can point to exactly the reason why Foxman claims that the Catholic Church has repudiated all efforts to convert the Jews: the document from the USCCB in 2002 that specifically denied that Jews need to become Christians, stating that the Jewish covenant was sufficient for salvation.
Rosalind Moss (a convert to Catholicism from Judaism by way of evangelical Protestantism) wrote a reply article that argued against the USCCB document. Below is the link to the This Rock article she wrote. This was the cover article, described on the cover as, “Why Jews Deserve the Gospel.”
catholic.com/thisrock/2002/0210fea1.asp
Permit me to copy one paragraph (italics in the original):
The report “Reflections on Covenant and Mission” is the last report listed on the Jewish Relations page at the USCCB website, although there is no link to it, unlike the other reports and most of the news conference statements, up to and including the news release for 1 June, 2007. Unfortunately, it doesn’t seem to have been recalled.