Why would someone put incestuous homosexual pedophile behavior in a WAR NOVEL unless someone in his personal life actually obsessed about men doing such things to naked little boys...
Because it was somehow germane to the story he wanted to tell, or the dramatic tension he wanted to create. You, and others, would have us believe it's because Webb is a closet incestuous homosexual pedophile himself, or would gladly have a few of them over to his house for dinner and drinks several times per week.