> Lumping part of New Hampshire in with Boston is like lumping Northern Ireland in with London. One side considers it a horrible insult and the other doesn't see why you wouldn't want to be associated with them.
For those reading who are not from the area, this is fun to imagine but not actually true.
The tension between Northern and Southern New England is less serious even than the Boston/New York "rivalry" which is notional and mostly confined to sports.