Those who see a wrong and have the power to correct it, have a responsibility to take action. This is the same reason why I'd act if I knew a neighbor was beating his kids, for example.

Besides, this is not a new attitude. Even Slick Willie had this attitude when the polls told him to. He just didn't have nuts to take it all the way and most of the time he handed our sovereignty to the UN and NATO (Kosovo, Somalia, etc.)