While Bush has been successful in nation destruction, his failure to bring any sort of security to Iraq or Afghanistan certainly echoes his famous contempt for nation building. Afghanistan is so insecure they probably won't hold an election this year, two years after the US took over their government. And check out this map:
Iraq started out better with an educated wealthy populace and no cold war battle history. But fourteen years of US sanctions and two US wars has destroyed a lot of the infrastructure, even its hospitals. And the security situation is only getting worse, averaging 1.5 coalition casualties a month and over 10,000 civilian casualties. The targeting of Iraqi civilian police is particularly unsettling, a determined campaign to prevent law and order.
The moral consequences of destroying countries and not rebuilding them is bad enough. But the practical consequences are worse. The Bush administration's foreign policy is undermining US security.