Blue-and-Whitewash

Noun.
When Jewish groups or individuals are used to cover up or gloss over the anti-Semitism of a third party, or absolve an anti-Semite of anti-Semitism
The use of support by a small group of Jews to obfuscate the underlying anti-Semitism of an individual or group
To give a veneer of respectability to anti-Zionists

Jewish Voice for Peace's main goal is to blue-and-whitewash away the anti-Semitism of Students for Justice in Palestine and other anti-Semites.