The phrase "new atrocity" refers to a recently committed act of extreme cruelty or violence. It suggests that something terrible and shocking has happened, which is different from previous incidents. Full definition
I wonder whether there is something else, too, in this widening acceptance of animals with pointy teeth: We accept risk in our daily lives (each time we drive, for instance) and we have become inured to endless wars and news of new atrocities. (dotearth.blogs.nytimes.com)
With the murders of Charlie Hebdo's staff in Paris and new atrocities committed by ISIS in the Middle East becoming apparent on almost a daily basis, to ask, as Bennett has, whether we should allow such organisations to operate legally in the UK is, frankly, to think the unthinkable. (ueapolitics.org)