One truism that I believe to be true is that "You don't crap where you eat.". In this case, you do not willingly seek to destroy the country in which you live. (Who wants to get shot down in their own driveway?)
If this is the case, then, the "who" in "Who is destroying America?" is an international actor ... one that would benefit from the decimation of America. That "who" is, pretty obviously to me ... China.
America was the "world's policeman" ... China seeks to replace America in that role. They've given our politicians millions of dollars, and in doing so have captured them and bent them to China's will.
China's playing a brilliant game. Notice how they're just sitting on the sidelines, waiting to pick up the pieces after the West explodes.
VDH bump!