If the story elements are making it so you cannot enjoy the book then i would stop reading it. There is too much to read out there to read something you have a negative feeling towards.

I understand the desire to get out of your comfort zone and confront ideologies that run in opposition to your own or to today's norms. Especially since those ideologies have not truly died and it is possible to encounter them in daily life but if you dread opening the book don't.