The Left has found its response to the idea that Syrian refugees should be carefully screened to make sure they aren’t Islamic terrorists.

As though catching a whiff of something unpleasant, it dismisses the idea as unfit for polite conservation. Contempt is a useful substitute of cogent argument. Even with 129 dead in Paris, some murdered by a terrorist disguised as a refugee, the thundering voice of the Left says it’s unacceptable to start talking about tighter border control.