2001-2008: Dissent is the highest form of patriotism.
2009-2016: Dissent is the highest form of racism.
2017-? (Probably): Dissent is the highest form of misogyny.
Your second statement, however, is downright ignorant, xenophobic and hateful. You're saying that, were America to be invaded and conquered, the entire world ought to be destroyed for it? I can't believe such levels of nationalistic arrogance. What your second statement boils down to is, "Americans are the only people worth having on this Earth, and if they were to go, the entire world might as well be depopulated."
Surely you don't believe that?
This is a ridiculous statement exhibiting a lack of understanding of nuclear weapons. The use of a few tactical nukes... or even a few dozen... would hardly "depopulate the world."
Even the use of dozens of strategic nukes on enemy cities wouldn't do that, not by a long shot.
Read up on the subject. I suggest some technical texts rather than left-wing publications.
Fiddling While Rome Burns
Carthago Delenda Est
"I used to roll the dice; see the fear in my enemies' eyes... listen as the crowd would sing, 'now the old king is dead, Long Live the King.'.."