RE: Homophobia, minor spoilers

About halfway through the book to the end, the main character shows disdain and disgust at homosexuality, but is accepting that others are that way. There was also a period of essentially reverse conversation therapy mindset. I think it might have been intended as a means of showing how the returning soldiers return to a different society than they left, and fitting into an unfamiliar society is challenging. The sci-fi and space combat aspects of the story were all pretty good.