[agnokapathetic]

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.

[coldtea]

You missed the whole point of the comment:

"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".