Did your army buddies turn on you? Did they not allow Jewish men to enlist prior to the Nazis taking power so there weren't any? Did they immediately kick you out or throw you in prison? I've never seen nor heard anything about this.
This author claims to have found evidence of a good number of people who were at least partially Jewish serving in Hitler's army.
Rigg discovered a large number of "Mischlinge" (part-Jews) who were members of the National Socialist German Workers Party (or "Nazi" Party) and/or served in the German Armed Forces during World War Two.
His work has been featured in the New York Times and on programs including NBC Dateline and Fox News. Reared as a Baptist Christian, he discovered he was of Jewish descent, converted to Judaism and served as a volunteer in the Israeli Army. He also later served as an officer in the U.S. Marine Corps.
His assembled documents, videotapes, and wartime memoirs on the subject are presented as the Bryan Mark Rigg Collection at the Military Archives branch of the Federal German Archives (Bundesarchiv) in Freiburg, Germany.
His book Hitler's Jewish Soldiers earned him the Colby Award (for first books in military history) in 2003.
http://en.wikipedia.org/wiki/Bryan_Mark_Rigg#Criticism
There were Jewish people in the Finnish army that fought alongside Hitler's army as well.