What was ‘incomprehensible’ about it? It’s written in very forthright prose.
Deponds on your definition of prose.
I like many others was forced to read it 50 years ago. I read it again last year. It’s fothright crap.
For what it's worth, I tried to read Ivanhoe 4 times, at 4 different times of life. It just never "took" with me. And I love great books.