Straw votes is a term to describe an unofficial ballot conducted as a test of opinion. However, straw votes are unreliable as they serve many disadvantages including a straw vote not often representing an accurate cross section of the total population.
I believe the answer is: read the novel aloud and discuss it with the students who struggle
When readers struggle to read they are very likely to stop reading it and making an opinion that the writing is bad and does not make sense. By making them read in group setting the readers would most likely realize why they do not understand it and it open up opportunities for exchange of opinion and idea among the group.
Idi Amin Dada was a violent dictator responsible for several atrocities during his reign.