Sludge will reply with a tale about his only immigrant friend "stanni" ...worse than Nick Clegg trying to appear "normal" on the campaign trail on 2010. "The other day i met Mike" etc etc
Sludge means well but he can be a bit nasty and spiteful if things don't go his way, all his views on immigration are formed by wishful thinking and theory. Exemplified by his coffee coloured dream.