Intriguing conversation! Personally I think the only thing the US needs to fear is the ignorance of our younger generation. If they don't understand basic history, politics, and economics, They will keep voting for socialists. Like the president now in office.
I do not fear invasion from the outside or from within. The reason for this is our 2nd amendment!
In Wisconsin alone there were over 600,000 hunters this season! That's more men under arms than in Iran. Or more than France and Germany combined! Wisconsin's hunters alone if organized would be the 8th largest army in the world. That's only Wisconsin, and only the hunters. There are many many more citizens that own guns but do not hunt (self included)
According to the Geneva-based Small Arms Survey. The U.S. has the best-armed civilian population in the world, with an estimated 270 million total guns. That’s an average of 89 firearms for every 100 residents — far ahead of Yemen, which comes in second with about 55 firearms for every 100 people, or Switzerland, which is third with 46 guns for every 100 people.
If you live in a country that does not allow you to own a firearm, you are not free. You are subject to being taken over by radicals, ideological or religious! Do not become complacent, fight for your human right to protect yourselves.
In the US, as long as we have the 2nd amendment, we are and forever will be free citizens. We will protect ourselves from invaders, foreign and domestic!