Not exclusively, it’s been used for a very long time to target socialists and indigenous people in the Americas as well, Bolivia, Argentina, and Chile’s dictatorships used it as a dog-whistle against their indigenous people, and perhaps even more so against their socialist movements.

During the cold war the “Judeo Christian” thing started to gain traction with reactionaries in the west as a way of distancing themselves from the “Judeo Bolsheviks” in the socialist bloc, how their values where better because they combined Judaism with Christianity, rather than Marxism, which was inherently meaningless because neither had anything to do with Judaism, and western liberalism has arguably little to do with Christian values either.