Nah, this type of red meat heated rhetoric is common place when Democrats are attempting to whip up their union auxiliaries, and has been for generations. The difference is that in the age of the internet everyone gets to hear about it and not just the union legbreakers.
Update: Capuano was part of the civility chorus after the Giffords shootings:
Cradle Catholic. Active in the pro-life movement since 1973. Father of three and happily married for 26 years. Small town lawyer. President of the board of directors of the local crisis pregnancy center.