I would agree with those would leave now but for the Barbary Wars which proved to
our first isolationists that appeasement generates kidnapping, coercion, tribute,
piracy, theft, impressment, and murder.  (The pirates claimed their Koran
told them to do it.)  And then we have entanglements.  What do you do about
our 10 million new brethren in Iraq who collaborated with us? What do you do
to defend our 51st state, Israel?  What do you do to keep the Taliban and El
Qaeda from getting Pakistan and its nukes?  How many nukes exploding over
there cause a nuclear winter over here?  How long before Iran has ICBMs
like ours?  All they really want is a world wide caliphate. They said so.
How would you deal with $9.00 a gallon  gasoline?  Who was that guy that
said Peace in Our Time at Munich?  Why did Hitler sink all the unarmed
merchant ships?  Just relax and watch the fireworks. This is the second
hundred year war.  It's not our fault.  Homo Sapiens is a predatory animal.
If you were a lamb and you had a gun you would shoot the lions. All of them.