Colin Sheridan: Reaction to Charlie Kirk's killing shows our selective compassion 

It is striking how one death prompts moral urgency from those who may have criticised many of the views of the man himself, while a daily reality of dozens killed and hundreds illegally detained is met with crickets

A memorial for Charlie Kirk at Utah Valley University in Orem, Utah. Picture: AP Photo/Lindsey Wasson

The other night I saw footage of something that — in the annals of history — usually elicits a moniker to neatly capture its horror. 

Kristallnacht, the Night of the Long Knives, even Bloody Sunday — each an example of a collective trauma so blunt, it’s etched in our memories, lest we ever forget.