I wouldn't get measured for your pedestal just yet, Nom. I still think you're misunderstanding the context of the statement. The phrase itself (which can be argued to be offensive or benign on its own) is included in a list of things describing the show. Where, or who, this list comes from is irrelevant. The point is the context in which this list is placed on the website. That context is that this list of things is what makes this show a terrible show you shouldn't support. So he's claiming that "promoting homosexuality" in a play is a reason not to support the play.
To me, that is homophobic, whether intentional or cause by sloppy copy/pasting. And it's also irrelevant whether or not this guy is gay. I know lots of gay guys who are homophobic. I think his taking the quote down is more of an acknowledgment that he pasted in haste and is removing the offensive words.
Art has a double face, of expression and illusion.