Earlier quoted context omitted.
Judeo-Christianity here just means Old+New testament. They just didn't use that terminology back then, but the notion was very much the same.
No. The Notion was not very much the same. Medieval views of the Torah / Old Testament were very much informed by anti-semitism. Medieval crusaders would have balked at the idea that Jewish and Christian values could have any form of harmony.
"Judeo-Christianity here just means Old+New testament. They just didn't use that terminology back then, but the notion was very much the same".
The didn't say "Old+New testament" but it meant exactly that, what scholars for a couple of centuries now refer to as "judeo-christian".