Depends what frame of time you're talking about. Next 50 years, I highly doubt it. America's military is so ridiculously stronger than all of the militaries in the world, it would have to take a huge catastrophe to destroy the U.S. I can't picture the U.S. falling anytime soon. Eventually, all "empires", and that's what the U.S. is, an economic, political, and military empire, fall, and the U.S. won't be an exception. But this talk of American falling soon is unwarranted, as bad as things seem to appear.
Military might alone doesn't win a war.
It is the will to use the military might, that makes it win.
USA has lost all wars after WWII.
Furthermore, we are being colonised and conquered from within.
The military might of the USA might very well be used against the patriottic USA-citizens.
Your argument is thus not valid.
Israel needs to become independant of the USA, and annex more territory, and expell all the non-Jews there, without any exceptions.
Then, Europe and USA/Canada/Russia/Australia/New Zealand needs to expell non-integrating or hostile immigrants.
South-Africa needs to be reconquered, to create an whites-only apartheid Boer-Republic.
Serbia must destroy the Albanians in Kosovo, and annex some part of Al-banania.