In the digital version of this high school textbook by Pearson you can look up the definitions of phrases. Here's how "Holy Land" was defined:
If the book intended to define the term as the Crusaders would have, then even this would be inaccurate. A quick look through the texts of the Crusaders does not turn up any mention of "Palestine." Jerusalem is really the goal, its country is not named.
But for something being written today this is essentially a whitewash of Jewish history.