OTTAWA—“Islam should be banned like we ban pit bulls.” You read that right. This was a Twitter post by an erstwhile candidate for the Parti Québeécois in the upcoming Quebec election. Suffice it to say he is no longer on the PQ slate. But let me repeat what he wrote: “Islam should be banned like we ban pit bulls.” Wow. It is hard to say anything about that beyond disgust that someone would (a) actually think this and (b) actually Tweet it. Talk about a career killer.