Trudeau's exempting heating oil was such a stupid move, you'd be forgiven for thinking it was a back-door way to sabotage the carbon tax. I mean, anyone who took introductory PoliSci courses could have told you this would be the end result.
As a side note, it's funny watching Conservatives fume about the carbon tax, when it was their idea in the first place. They wanted market-based solutions like a carbon tax and/or cap-and-trade; the real left-wing solution, as opposed to the neoliberal bullshit we have now, would have been straight-up regulation.