The ancestors of today's Europeans couldn't understand the significance of what they were doing when they vandalized Rome. The modern descendants of those Vandals are capable of understanding the significance of their actions.
The Vandals who sacked Rome had nothing to lose from the destruction. The Vandals who are sacking Libya have a lot to lose from the destruction.
The destruction of the Libyan military is creating an opportunity for al Qaeda to take over Libya. Al Qaeda is a long time adversary of Muammar Qaddafi, but had been too weak in Libya to challenge him.
NATO's attacks on Qaddafi's military are rapidly changing that balance. Afghan war veteran Abdul-Hakim al-Hasadi is already taking advantage of the situation to lead the anti-Qaddafi effort in Darnah. He potentially could use his combat experience to take over the rebel movement.
If al Qaeda takes over Libya, it will have access to oil money and perhaps gain an opportunity to blackmail European governments to get out of Afghanistan. If al Qaeda takes advantage of NATO's overthrow of Qaddafi to take over Libya many NATO leaders will join their Arab counterparts in the unemployment line.
Some might even face criminal prosecution for treason (giving aid and comfort to the enemy). In the U.S. a latter day Joe McCarthy might emerge and use the incident to attack individuals who had nothing to due with the decision.
British Prime Minister David Cameron would likely be classified with Prime Minister Neville Chamberlain who gave in to Adolf Hitler's demands to obtain what he called "peace in our time".
NATO is risking creating anarchy. Anarchy tends to produce tyrants The difficulties of replacing anarchy after the fall of a tyrant can produce a new tyrant like Napoleon or Lenin. Anarchy in Libya could also cause a cutoff of oil until someone restores order.
The U.S. is still in Iraq because of the difficulties of restoring a stable government. The American presence prevented al Qaeda from taking over Iraq as it attempted to do even with the American presence.
NATO needs to be preparing to move a peacekeeping force into Libya to replace the government NATO is destroying. Marines from NATO nations should be on the ships offshore now or be in route to them. American paratroopers in Italy and the paratroopers of other NATO members should be loading planes with equipment and preparing their gear so they can take off at any time. Turkey would be the best choice to control post-Qaddafi Libya because it's a Muslim nation. .