Anyone who thinks that man is homosexual is missing some basic powers of perception, I'd say...... :o)
Doubt they really do believe it; I figure even they aren't that stupid. More like a wish on their part, so they could point fingers at him and scream at his strongly religious supporters, "See, see, he's not really spiritual, he's just a fake." And it would make them feel superior if they could bring him down to their level. Because they hate him for what he is and what he has accomplished.
Oh, and IIRC that trash book by Kitty Kelly tried to make the case that he is a closet homosexual. I am sure that many on the Left have read that piece of filth, and they wish, oh how they wish, that what she wrote would prove out, for the reasons I stated. The Liebermen thing, wherein they try to make that a homosexual issue, is just some kind of straw for these drowning people to grab, I think, but it is also a follow-on to the Kelly book.