Funny, this is exactly what Osama bin Laden and the terrorists say.
From Genesis to Revelation the Word shows us clearly that God looks on the choices of indivduals, cities, and nations and blesses or curses each according to their deeds. Who the "sheep" and the "goat" nations are is becoming more defined. Think of God's Mercy as a wheel, at the top of the wheel we have blessing and at the bottom, judgment. God's Mercy is blessing when we are obiedent and if we are not then His wheel turns to the Judgment side in His Mercy, He judges us that we might repent!
Is the wheel is turning for America?? I have no doubt in my mind we as a nation will be held accountable for the millions of unborn dead, as sure as God's Princple of sowing and reaping has not been voided.
God help us to truly repent from wickedness. This may not be a popular viewpoint but God's Word is Truth. Seek Him while He may be found.