Strawman. The only two alternatives are not assassination and letting someone go.
How about apprehending U.S. citizens who are suspected of terrorism and trying them in a military court? We'd need to change the law to create a definition for terrorists as being engaged in war activities, but that should have been done long ago.
Agreed on part one. I think we'd all be okay with shooting a guy with his finger on the button, so to speak.
As for the other part, I don't see why we need special tribunals. Makes far more sense from my perspective to try them in regular court.

Sounds like the next demand will be Obama prove he is really a US citizen. 