About three days ago, a poster (whose name I can't recall) asked the question on a thread (which title I can't remember), which went something like this:

"I read of lots of saints who did good work rescuing Christians from the clutches of the Muslims or going to convert the Muslims, but I never seem to hear of any saint who did likewise in relation to the Jєωs. Does anybody have any saints in this second category?"

Well I have since found a saint you might like to read about. His name is St John of Capistrano, a Franciscan friar and known as the "Scourge of the Judeans".  http://www.Jєωιѕнencyclopedia.com/articles/4004-capistrano-john-of

If you are looking for such information, some of the Catholic websites like to "clean up" the reputation of saints who nowadays would be accused of being "anti-semitic". The irony is you are more likely to read the uncensored version on Wikipedia http://en.wikipedia.org/wiki/John_of_Capistrano

Compare their version of St John with that of catholic.org: http://www.catholic.org/saints/saint.php?saint_id=692

Of course there are other saints in this category. I think I remember hearing that St Anthony of Padua might qualify.

Quote from: 2Vermont

I'd be interested in saints who were Jєωιѕн converts prior to WWII.

The major one that comes to my mind is St. Paul. Also known as "the apostle".

Yes.  It's interesting because today, in addition to being the 3rd Sunday After Epiphany, is also the Conversion of St Paul.

There are many saints who converted from Judaism.

The first one that comes quickly to mind is St. Teresa Benedicta of the Cross (AKA Edith Stein) who was baptised in 1922.

We pray daily for their conversion.

I knew about Edith Stein.  Thanks.

And thank you for your prayers.  My family, especially my elderly father an mother, need them.

If you are looking for such information, some of the Catholic websites like to "clean up" the reputation of saints who nowadays would be accused of being "anti-semitic".

Ah, yes.  It wouldn't do to flout Nostrā Aetate, would it now?  But I'm not particularly bothered by hagiography written using Catholic-tinted glasses, as long as it's not claimed to be genuine history.

I would strongly object to revisionism of original sources, especially those  published before Vatican II: Not only if the revised docuмent fraudulently insists or implies that the reader is being provided with a faithful copy of the original docuмent, but also if it's revised without admitting to any changes.

So if you have any reliable information that, e.g., New Advent's pages from the 1913/1914 Catholic Encyclopedia have their text altered to conform to the former's enthusiastic Novus Ordo stance, that would be something that ought to be brought to the attention of CathInfo readers.  "Reliable information" would include comparison with the text as originally printed, or the inclusion of plainly anachronistic material.

The irony is you are more likely to read the uncensored version on Wikipedia [....]

Calling it "irony" and "uncensored" is a misinterpretation of what goes on--or at least went on--there.  There's nothing iron[ic] about it at all.  Wikipedia has some aggressively antiCatholic editors who are determined to hold the Church up for censure or ridicule.  So it's less likely to be the absence of censorship than the insertion of any, um, manure they can find.  Its readers should expect to see a person's actions not judged by the moral standards of the historical period in which that person lived, but criticized according the secular politics of the 21st century.

I've tried to keep this reply short, so as not to distract readers from the original topic.  But maybe it's time for another--separate--"Wikipedia  & vs. Catholicism" topic.

I'd be interested in saints who were Jєωιѕн converts prior to WWII.

 Here's another, 2Vermont:

St Epiphanius of Salamis, Doctor of the Church
12 May

Born in 315 of Israelite parents, near Eleutheropolis, in Palestine. He began to study Holy Scripture and with his sister received Baptism; then leaving part of his inheritance to her, he sold his property, gave the money to poor, only keeping what he needed to buy books for his studies.  
 
With a desire for perfection, he was formed for monastic life by the solitaries of Egypt. He returned to Palestine, was ordained priest and founded a monastery in Eleutheropolis of which he was abbot for 30 years. His labor to grow in virtue seemed to surpass his strength; but always his answer was: “God gives the kingdom of heaven only on condition that we labor; and all we can do bears no proportion to such a crown.” He would relax his austerities for hospitality’s sake, favoring charity over abstinence. To all this he added tireless application to study. He was shocked in reading the many errors of Origen, and began early in his life to caution the faithful against them. Epiphanius benefitted by St Hilarion of Palestine’s spiritual direction for over 20 years.

A prophecy made to him in Egypt, that one day he would be bishop in Cyprus, alarmed him; and so he decided to go elsewhere. But his ship was blown off course to Cyprus, where the bishops were assembled to choose a new bishop of Salamis, and by providence Epiphanius was elected. He continued to wear the monastic habit, visiting his Palestine monastery from time to time.
 
In the Arian persecution in the reign of Constantius, St Epiphanius often left his cell to comfort and encourage the Faithful. The veneration which all men had for his sanctity, exempted him from the persecution of the Arian emperor Valens; being almost the only Catholic bishop in that part of the empire who was spared.
He was the oracle of Palestine and the neighboring countries; no one ever visited St Epiphanius who did not receive great spiritual comfort by his holy advice.
 
He journeyed to Antioch to try to convert Vitalis the Apollinarist bishop; and he attended a council convoked at Rome by Pope St Damasus.  He was a friend of St Jerome, addressing him as "most loving lord, son, and brother, the presbyter Jerome". He was an authority on Marian devotions, and his writings include a Bible dictionary, and The Medicine Box, a huge work which catalogued and refuted 80 heresies of his day.
 
In 403, he was taken ill and died during the voyage from Constantinople back to Salamis, having been bishop 36 years. God honored his tomb with miracles.