I think this comment is a really good summary of what the book was about for me, and I similarly did not find the book homophobic. The narrator does and says nothing to suggest his repulsed reaction to the rape of his friend or probable later sexual abuse of a child/other children is generalized in his mind to men who have loving relationships with other men. The person who criminally commits these acts is clearly getting off on power and violence and there is no implied or stated correlation between what he does and homosexuality.