The writer has a serious problem with reality.
1. No nation can end its military presence anywhere that terrorists (unambiguous or not) are killing their citizens. Solution for Al-quaeda? Stop.
2. The USA hasn't supported Israel's occupation of Palestinian territories uncritically for since 1973. Solution for Al-quaeda? Read the news.
3. If we were to withdraw our support of corrupt and coercive regimes in the Arab and Muslim world, we would have no need for an Arab desk in Foggy Bottom. Solution for Al-quaeda? Stick to blowing up muslim thugs and princes and let the devil sort it out.
This writer has obviously never counselled the mentally deranged.