Yes, I can see how many non-Americans (and, unfortunately, even some Americans) would LOVE to see America collapse. I guess for some, it would be poetic justice.
Just one glaring difference - when America declared independence it did not cause the collapse of the nation it was leaving. It simply severed itself from that government and instituted it's own. What the Progressives are doing is trying to collapse the country...to bring about it's economic doom. Did the King's economy collapse when America declared independence? Did the country fall into ruin? Nope.
One thing to remember...if America collapses economically, don't be surprised if other countries follow suit.