Ah, don’t you think 9-11 made it our business?
Would Ron Paul also say that Hitler was none of our business as well?
And do you think the United States would have won against Hitler with a 'resolution' instead of a declaration of war?
Besides, most Americans at that time didn't want to go to war against Hitler and that was the basis of FDR's campaign, that they wouldn't send their sons to fight again in Europe.
Had Hitler not declared war on the U.S. first, FDR would have been hard pressed to convince Congress to get a declaration against Hitler.
It was probably Hitler's second greatest blunder, next to invading the Soviet Union.