way before 2015 in the usa, and perhaps in english speaking countries in general given the prominence of american thought in the 20th century, the word has a rather different history. the idea of the 'judeo-christian tradition' comes to the fore in the lead up to world war ii. in the 1930s, english speaking fascists had a tendency to call themselves things like 'father coughlin's christian front', the 'christian american crusade', 'christian aryan syndicate', etc etc. in this context 'judeo-christian' became a term used by anti-fascists of the time; in 1941, the left-leaning magazine protestant digest described itself as 'a periodical serving the democratic ideal which is implicit in the judeo-christian tradition'. authors discussing the 'judeo-christian tradition' at this point argue that fascists and nazis who attack jewish people are attacking people who share their basis for civilisation. in this tradition, the exact nature of the 'judeo-christian tradition' was kept quite vague, which was noted by some at the time - the term was more symbolic of arguing that both faiths essentially worshipped the same god than anything to do with specific and particular shaped items of religious belief.
United States