-Why, in your opinion, do you think Sir Walter Scott chose to write Ivanhoe in this certain style?

Scott was trying to get away from his "expected" style of writing, in which his novels dealt almost solely with the historical Scottish Highlands.

Ivanhoe is not a "history" of a people, it's a novel, and it's supposed to be entertaining rather than education or point making. It's a romance rather than a tale of the times. It's also fantastic!