Bill Maher published a great book "If you're driving alone, you're driving with Bin Laden", pointing out what the US government SHOULD be asking of Americans if it really believed that the fight against Al Qaeda was as important as WWII.
The sad truth is that - of course - the war on terrorism is not a real war. Terrorism is a police matter, and there is absolutely NO chance that Al Qaeda could hurt the US as much as the wars in Iraq and Afghanistan have hurt it. Countries like the UK, Spain and Germany learned that the way to deal with terrorism is to enforce the laws, but not to let terrorists change your society. You engage constructively with less violent groups that represent the same issues as the terrorists, and you work out a solution for the real grievances. You don't join in with the terrorists, since that leads nowhere.
So the issue is not that the US is not doing enough. It's that it did too much.