I recognise the pattern you're talking about: I'm American, and worked for an Irish arts centre in Los Angeles for a couple of years in the 80s. There we had the "Irish Ethos Committee", not a million miles from Comhaltas as I've expreienced it in England, and similarly made up of migrants whose interpretation of their own culture was frozen in time. I guess this is a pitfall of any similar organisation: it will only be relevant to certain people at certain times, particularly as preserving that interpretation of the culture becomes central to its reason for being - hence the charges of insularity. I don't think that's the same thing as the implied racism of English people perceiving them as the "wrong sort" of Irish people - in fact, there are people from their own community who are probably thinking the very same thing...