Not sure why people are so put out by a photo of Farage, when Morrissey has allied himself with this person in previous interviews. Were these posters similarly outraged when Moz said he would make a good Prime Minister, and were you posting on this site condemning Morrissey's words? Thought not - so why does the association bother you now?
As it stands, I'm not sure it's much more than a slightly tongue-in-cheek reminder of how far apart Morrissey and Marr have drifted, and how far off the table a reunion is. Sure, Johnny could have been more polite, but the guy must have been asked about a Smiths reunion at least five times a day for the past 35 years, plus Morrissey has publicly 'banned' him from mentioning his name anyway - I can forgive Johnny for occasionally pushing back at how ridiculous the notion of a reunion is.
Personally, my feelings are that even if Moz, Marr and Joyce were all besties and decided to get back together, I'm not sure how it could ever be The Smiths again without Andy. There is no going back to the old house. It's been condemned, knocked down, and a block of flats has been put up in it's place. Let it be.