Want to know where Monty Python got the inspiration for that “People’s Front of Judea” sketch?

The groups that are all affiliated with this one:

Communist Party USA
Democratic Socialists of America
Freedom Road Socialist Organization
Freedom Socialist Party
International Socialist Organization
Party for Socialism and Liberation
Revolutionary Communist Party
Socialist Action
Socialist Alternative
Socialist Equality Party
Socialist Party USA
Socialist Workers Party
Spartacist League
Workers World Party
World Socialist Party of the United States