What if every European nation met with the Huns and invited them in to take whatever land they want instead of fighting and defending from the invasion?
What if every European nation met the Vikings on the shore with food, treasure, and women, and told them to take whatever they want undisturbed?
This kind of accommodation of aggressors and vandals is NOT 'enlightened', it is like a dog rolling over with its belly up. It is abject surrender. It is not 'civilized'. It is not sophisticated or open-minded. It is pusillanimous surrender. This is the behavior of craven cowards.