So let's say a guy is living in his cabin in the U.S. He's blown up by a drone strike. The President swears he was plotting some 9/11 like catastrophe, but can't provide any evidence on the basis that it would compromise national security. You going to support the President?
Your illogical leap in the OP was one that assumed Holder's letter means he is saying they can kill Americans without due process. It was a bogus leap not supported by anything in the letter.
The guy shooting up a school example I gave is more in line with the examples Holder gave. When there is an immediate threat, you don't have time to get permission from a judge to kill the bad guys. You are obliged to stop them with lethal force if necessary.
That is all Holder is saying. Common sense shit which does not seem to penetrate some low voltage minds.
So when you come up with the guy in the cabin, you are again making an illogical leap that Holder is saying he would just blow the guy up rather than go to all the trouble of arresting and trying him, even though Holder plainly said that is exactly what he would do. Leave it to the domestic authorities and justice system.
I am sorry I did not take your troll bait.