The first time I came across the name AA Gill I immediately visualised the food critic 'Gil' from Frasier.
But immediate visualisations aside, what difference do AA Gill's political leanings (re: right wing snob) make to the overall construct of his character? A vile character is a vile character, politics notwithstanding, surely? Have you ever met a left wing snob? Take a quick scan through the articles on The Guardian website and you'll encounter your fair share. Or are they less vile for being on the left? If, at the end of the Morrissey hatchet-job, Gill wrote "P.S. Greater Manchester is a much 'greater' place now than it was in 1959, for two reasons: 1) Morrissey left it, and 2) the Asian population has grown exponentially during that time - take that Mr. 'the Chinese are a subspecies'", how vile would his character be then? Moderately, but at least he's not a bigot? Or, at least not the 'wrong' kind of bigot - he has made some truly disgusting remarks about the Welsh, the English, and the Manx, but they're all white and working class so who would blink an eyelid? Nobody on The Guardian's writing staff anyway.
Here's some left-wing bigotry direct from The Guardian comment section, but this might be the elusive "right kind" of vile character which you claimed didn't exist.