I see this term a lot when people want to refer to cultural influences on the West yet it seems pretty stupid. Judeo Christian actually just means Christian, Judaism had very little to do with western culture as for large chunks of western history the Jews were actively persecuted and for all of Western history Jewish people have made up a very small minority.
If any religion is going to be conflated with western culture, it is Christianity, Judaism simply has not been a major part of western culture and still isn't. It also treats Judaism and Christianity as if they are 2 very similar entities as opposed to 2 very different religions.
The term seems pointless and misleading and I don't understand why people insist on using it instead of "Christian", "Western" or more accurately "Secular".