Never Again has become an empty phrase. Something that angry world leaders shout when the victims aren't eager enough to appease the Third Reich or the Seventh Caliphate
Never again. To Jews it means a refusal to give genocidal bigots another go at them.
To Obama, it means refusing to ever again have to listen to an Israeli leader explain why his country cannot commit territorial suicide in order to appease a gang of genocidal bigots.
When the Jews who fought among the crumbling walls of the Warsaw Ghetto finally made it to Israel, they came just in time to load up their guns and fight once again for their people's survival.
The survivors of one genocidal ideology bent on making someone pay for its sense of humiliation came just in time to fight off another version of the same thing.