Let's put this another way:
'Absolute obligation' to investigate Bush & Cheney

Millions of people say Bush "lied to the House" when he claimed that Iraq had WMD (plus a long list of other lies) which is considered unethical by any self-respecting society.

"I think that the House has an absolute obligation to open an inquiry, and I hope there will be a resolution to investigate them. And I think this is a big deal. I don't think the President of the US can lie to the country on national security matters," the people of the US have been saying for years.

Let's put this another way:
'Absolute obligation' to investigate Bush & Cheney

You're precisely correct, dec. Any other view is logically inconsistent and beyond rational analysis.