Would you not read a book because you disagree with the author’s politics?
It seems the question wasn’t phrased correctly because people are giving Ann Coulter as an example when she is not an author but just a professional troll.
I don’t really think about the author’s politics much when I’m reading they’re books. For example, I read Ender’s Game knowing that Orson Scott Card was a hard right wing douche bag and was willing to put my feelings about him aside to read a book that is highly regarded in scifi and even enjoyed it. Most of the time I’m not even aware of the author’s political beliefs when reading their novels.