From Wiktionary, the free dictionary
Borrowed from Hebrew חילול השם.
chillul Hashem
- A disgrace before God; especially, shameful behavior by a Jew seen as 'giving God a bad name'.
2001 January 14, Moshe Shulman, “JEWS FORBIDDEN ON TEMPLE MOUNT”, in soc.culture.jewish[1] (Usenet):You don't hate Zionism. You hate Jews. It is a chillul HaShem every time you quote the holy Satmar Rov ZT'L.