When I was young and ignorant, I tended to agree with this simplistic statement.
Then I realized than in Washington's day, there were no satellites, no transatlantic cables, no OPEC, no NATO, no internet, no GAT, no NAFTA, no television, no cell phones.
How does one pull up the drawbridge 200 years after the drawbridge became an anachronism?
As the Muslim Mass Murderers showed us, we don't need to go to them, they will come to us.
Or are you suggesting we not allow air travel between the U.S. and anywhere else?