I think most people, "liberal" or not, would take offence at a murder novel that glorified the murderer and made him the hero of the piece. I think someone's cried homophobia and he's scared it might stick tbh, hope I'm wrong mind.
And I'd say it's homophobic to claim that criticising someone for writing in glowing terms about gay incest with a minor is homophobic. It suggests that all gays are somehow involved in incest, paedophilia and other forms of wrongness - otherwise why isn't it also heterophobic to have a go about people who talk about "straight" incest with a minor? It's clear, at least to me, that it's the incest with a minor part rather than the gay part that people find offensive.
However, I suppose Hari would rather we were talking about whether his "friend's" writings were acceptable when the alternative is to concentrate on his lies, plagiarism, fraud and various other crimes against journalism.