That’s like saying why dont the real whites shut the KKK and Aryan Nation up? Or why dont the real blacks shut up Farrakhan!
Great point, but here's the difference:
The vast majority of whites --even people at FR-- find that the views of the Aryan Nations are repugnant. Racially reactionary whites are in the miniority. The recent inroads of BLM suggest a growing sympathy of blacks to the views of the Nation of Islam, but the average US black isn't a member of N.O.I.
But any conservative Jew at a large family reunion in the US can tell you he will find himself in the miniority. Probably 70-75% of Jews in the US vote Dem and strongly espouse liberal political causes, thus the old saw about "Jews earn like Espiscopalians but vote like Puerto Ricans". Patterns in Israel and Habad communities abroad are different, but the average Jew who at a Passover meal protests affirmative action and advocates for concealed carry will gradually find himself shunned.
Bizarrely, the Progressive Pressure factor is suicidally active even in such places as Sweden, where Jews are harassed or hunted down with metronimic regularity, in spite of their hard work to advance the interests of "migrants" [sic].