Um this is the united states we already knew that he was imperfect because he is using western technology... The united states government and military dosnt defile that job is left to the public... As for the UK they may do it...
There is nothing inherently bad (from your average Muslim's perspective) about using western technology. Some Muslims will say there is, most probably won't give a hoot one way or another, and some will probably say there is nothing wrong with it.
And we already know (or in the interests of fairness: 'we have reason to believe') that he was a pretty poor Muslim, since he was probably responsible for the deaths of thousands of civilians, who were killed in an operation that was carried out by members of a group he founded.
And as for what the Quran says on killing, here's one quote:
http://www.harunyahya.com/Quran_translation/Quran_translation17.php#33Nor take life - which Allah has made sacred - except for just cause. And if anyone is slain wrongfully, we have given his heir authority (to demand qisas or to forgive): but let him nor exceed bounds in the matter of taking life; for he is helped (by the Law).
Read this for what I think to be a pretty decent summary of the Quran on the topic of killing: http://islam.about.com/od/terrorism/f/terrorism_verse.htm
As for the US government: if by 'defile' you mean 'make propaganda', then I disagree: I think every government makes propaganda of some sort. I would go into details but I'm half asleep right now