Some missionaries are posting videos or other "testimonies" of former Jews who have become Christians. When their backgrounds are explored one finds that these Jews were raised in non-religious homes. Some, like Avner Valer, also have mental health issues (he is diagnosed with psychosis and schizophrenia). Many were drug users (Valer and Michael Brown). Almost all had little to no religion as teens (Michael Brown, Avner Valer, Moshe Rosen - founder of Jews for Jesus). . .
Why is it that missionaries think that "testimonies" by various formerly secular Jews (some with issues such as Avner Valer and Michael Brown) would be persuasive in convincing Jews that they "know something" hidden from the rest of us Jews? The opposite is true when one simply researches their backgrounds!
As the prophet Hosea wrote "My people has been eliminated for lack of knowledge; for you have spurned knowledge and I will spurn you from serving Me; and as you have forgotten the Torah of your G-d, I too, will forget your children." Hosea 4:6.
Those people are cutting themselves off from G-d and the Jewish people. A Jew cannot be a Christian (messianic "Jew" or any other term) and be part of the Jewish people. . .
Contrast that type of person with the Christian who chooses to convert to Judaism. Most are highly educated. They are former ministers, priests, nuns, messinaic "rabbis" and such -- who as they searched came to realize the truth -- that Jesus was not the messiah let alone a god. . .
Here is a list of people who made their way through Christianity and went on to find the beauty and truth within Judaism. The image (above) is a book by world reknowned Dead Sea Scrolls scholar and former priest, Geza Vermes. . . Vermes family were Jews who converted to Catholicism when he was 7 years old (an attempt to avoid the Holocaust). His parents perished in the Holocaust.
1) Asher Wade, former Methodist pastor; he converted in 1978 to Orthodox Judaism.
2) Ole Brunell, former Lutheran minister from Finland and Australia. Along with him, his wife Ruth (formerly Runa), two adult daughters, two teenage daughters, and a former son-in-law also converted to Orthodox Judaism.
3) Geza Vermes, expert on the Dead Sea Scrolls and former Catholic priest, he reverted to Judaism.
4) JoAnn Fay, a nun converted to Orthodox Judaism in 1980.
5) John David Scalamonti, a former Roman Catholic priest, he converted in 1972 to Orthodox Judaism
6) John Hove, a former Lutheran pastor, he converted to Orthodox Judaism in 1988.
7) Sheldon Christopher Smith, a former Pentecostal Pastor converted to Judaism in 1987
8 ) Thomas Roper, a former Baptist minister, he converted to Orthodox Judaism.
9) Gavriel Sanders, former Pentecostal minister and missionary in Israel, he converted to Orthodox Judaism.
10) Tonica Marlow, a former female evangelical minister and daughter of a Pentecostal preacher. She converted to Orthodox Judaism.
11) Aharón Calderón, a former monk of a Catholic monastery in South America, he converted to Orthodox Judaism.
12) Armando Quiros, a former catholic priest, he converted to Orthodox Judaism.
13) Julie Galambush, holds a Ph.D. in Old Testament studies from Emory University and a Master of Divinity from Yale Divinity School. Formerly an ordained American Baptist minister, she converted to Judaism.
14) Michael Flanagan, a former Baptist minister, and son of a Minister, his mother-in-law, wife and their two adult sons, grandchildren, daughter-in-law also converted to Orthodox Judaism.
15) Ahuva Gray, served as a Christian minister in the African American community both in Chicago and Los Angeles for fourteen years. She left that world in 1996 to fulfill her spiritual yearnings and become an Orthodox Jew.
16) Nobutaka Hattori, a former Protestant Minister of Japan, he converted to Orthodox Judaism.[http://www.ou.org/pdf/ja/5766/summer66/24_27.pdf]
17) Carlos Samuel Salas, a former Methodist minister, he converted to Orthodox Judaism.
18) David N. Weiss, Former Presbyterian lay minister David Weiss (born Jewish) embraced Orthodox Judaism and is now a successful writer living in Los Angeles.
19) Abraham Carmel, born Kenneth Cox, a former Anglican and Roman Catholic priest, he converted to Orthodox Judaism
20) Mariano Otero, a former Assemblies of G-d minister is now a counter-missionary
21)Carole Le Faivre-Rochester, a former Dominican nun, she converted to Judaism in 1989
22) Yaakov Ephraim Parisi, former Pentecostal minister
23) Ary'el Tsion, formerly known as Bert Woudwijk, a Messianic pastor from Holland
24) Leon Fundo, former Seventh Day Adventist preacher
25) Moriya Webster, former Worldwide Church of God pastor
26) Dov Heller, former Minister and missionary
27) Benjamin Klugger, former Pentecostal missionary, now Orthodox Jew and head of counter-missionary organization
28) Paul H Goodley, former Messianic "rabbi"
29) Efraim Uba, was raised Catholic, later became a Pentecostal preacher then became a Messianic in Nigeria, and then later left that Christian sect to convert to Judaism
Sophiee Saguy has been countering false missionary claims about Judaism and the T'nach (Jewish bible) for nearly twenty years. You may find her on FaceBook and at the Messiah Truth forum.