Rep. Michael Capuano was speaking at the Boston rally in "solidarity" with the Wisconsin protests. Last month, after the Tucson rally, he said: "There's always some degree of tension in politics; everybody knows the last couple of years there's been an intentional increase in the degree of heat in political discourse. . . . If nothing else good comes out of this, I'm hoping it causes people to reconsider how they deal with things."
James Taranto cries hypocrisy, but it's not all that hypocritical. Capuano said there would always be "tension" in politics, that people are intentionally increasing that tension (or "heat"), and that people should think about "how they deal with things." You can read that a lot of ways!