Peter Kent is Not Alone

[jamesq]

The important part isn't that d'Artagnan Justin Trudeau used un-Parliamentary language (though he should do better), it's what prompted it. Namely, the fact that Peter Kent harangued the opposition for not attending a conference that he had prevented them from attending. That takes cheek. It also points to how badly the Conservatives have been acting in Parliament:

University of Ottawa political science expert Michael Behiels said there is no doubt the Conservatives are responsible for the explosions of anger by continuing to press and to heckle and to try to undermine opposition parties at every opportunity despite having a majority government.

“And I think the opposition has its back against the wall and doesn’t know what to do,” he said. “Not a single opposition amendment has been accepted. Everything they try to do is basically laughed at, dismissed. So the opposition MPs have had it, and it’s just pouring out.”

Mr. Behiels predicted this pattern would continue for the foreseeable future.

“Harper’s won his majority after 20 years [of] fighting for it and he’s basically decided he’s going to stick it in the opposition’s faces at every opportunity,” he said. “They just cannot let up with this sort of mentality.”

Source

In other words, they're acting like school-yard bullies.