They are not left wing nuts. They are Irish Catholics who suffered a lot of discrimination in the 40s-60s who value the first Catholic president Kennedy. This is also why Kerry is alledgedly catholic and used to pretend to be Irish.
But there's plenty of left-wing nuts in Boston (I've worked with too many of them) -- where do you think Harvard grads and wannabes and hangers-on go?
I'm Irish Catholic myself and lived in South Boston all my life; I know lots of people who will vote for a conservative even if he's Republican, but don't want to register as Republican because of the old discrimination and "Republicans are for the rich and big business," which was probably true enough, certainly 50 years ago. Nowadays, the politicians around MA all look out for themselves first, and for most of them that involves not offending the national Dems.
I can't think of a Northeast Republican who would qualify as conservative by FR's standards. Most of them fit in quite well with the Beacon Hill gang, and one hand washes the other. (Romney apparently tries -- somewhat sporadically -- but he strikes me as a wimp, fundamentally unprincipled as soon as he meets opposition.)
"He's Irish only every sixth year"--former Mass. Senate Press. and former UMass Pres. Billy Bulger
(Howie just wrote a book about Billy and his gangster brother Whitey. Out next month; I already pre-ordered mind. http://www.thebrothersbulger.com
MOONBAT CONSERVATIVES are those who would rather lose to a liberal than support a moderate
I vote for the man or woman that I want not just another evil. Someday maybe you'll see that getting forked by the Republicans is like hitting yourself with a hammer. It feels so nice when you stop.