The term comes from a Messianic Jewish organization founded by the late Moishe (ne Martin, 1932-2010) and Celia Starr Rosen. Called "Jews for Jesus", the organization is a 501(c)3 Messianic Jewish ministry which is often targeted for vile persecution by groups such as the Antimissionary organization Jews for Judaism.
In unofficial competition with Bratslavia to be the capital city of Slovakia (as Baltimore competes with Washington, D.C.), Košice is a major-enough city to get some notice even outside of Slovakia. Like Suwałki in Poland Russia, Košice was the capital city of its own district in Austria Hungary.
Families in the Košice Jewish community included the Yoshua Rusnak Family, whose patriarch helped lead the Zionist Conference there in 1913. Sadly, the family lost many members during the Holocaust when the Nazis invaded then-Kassa, Hungary.
The Khazars were a Turkic people among whom Central and Eastern Ashkenazic Jews resided. While some Khazars converted to Judaism, most did not and remained in the pagan Khazarate religion. "כוזר" ("Khazar" in Hebrew) is not be confused with "חזאר" ("(c)hazar", "pig" in Yiddish)