Not by the definition in MW and that is the meaning that I am using.
"having historical roots in both Judaism and Christianity"
Are you saying the OT is not about Judaism? Is the OT included in the Christian's Bible? If you say yes, then it is perfectly logical to use the label, "Judeo-Christian".
This quote seems to differ with you.
"Daniel Lapin, an Orthodox rabbi, author and radio show host in 1998 wrote a book with the subtitle, “An Orthodox rabbi insists that Judeo-Christian values are vital for our nation’s survival.” In an interview,
Lapin defined “Judeo-Christian values” as “those values that are held commonly by Judaism and Christianity.” For him, these include the ideas that “wisdom comes from an external source rather than from our hearts” and that “the nuclear family is the fundamental unit of society.”
What are ‘Judeo-Christian values’? Analyzing a divisive term
You have every right to disapprove if you wish, however, you do not have the right to tell me that I am wrong.