I do not want to close the door. The United States let people into our nation and closed the door as needed at times. There were still some who snuck in. It takes some time for people to be assimilated into our culture. Imagine many groups with most acting in near the same manner in a general way. What has happened since the 1960's is treason. We were at our peak. Not anymore. Living off our past can only go so far. Losing the reserve currency status at some point is going to make things difficult. Perhaps when things get tougher, you will still have that Prog piss and vinegar in you. Your own politicians are selling our nation out in pieces to others.Your view of American history is laughable. America became the superpower it is because we had open borders and assimilated foreign peoples and ideas. Ironically there were always voices, probably just like yours, that wanted to close the door.