How would Tony deal with Connor and Murphy MacManus from The Boondock Saints killing his men?

If Connor and Murphy MacManus from The Boondock Saints ever decided to kill members of Tony Sopranos crew for vigilante justice because they hated criminals how would Tony react to that?

Two crazy vigilantes killing made guys just because they can and interrupting businesses, that would destroy North Jersey, unless they went to Little Italy and shot up Johnny Sack's bat and club first with inside.