Perhaps he has recognized the following fact: you can't bring that (suicide rate) up even if you are polite. I've watched people try. They are at best ignored and more likely attacked, Maybe he just recognized that, and the same sort of response any time someone attempts to alter the narrative around the subjects he addresses, and decided there was no point to being polite. Feminists realized that long, long ago. You may have noticed that no one tells them to be polite about the subjects they address. 
I see a double standard.
I look forward to the day when the Globe takes say a half dozen of his political comments and actually analyzes them and attempts to refute them with facts and logic. So far it is just a lot of emotional verbiage. Who does that serve?