"Also, it is not fact that it's wrong and sick - this is opinion."
It isn't an opinion; you have no right to initiate the use of force on another individual. Their life isn't yours to do with as you please.
Your ability to justify, by proclaiming "opinion" is disgusting, and then to cowardly back-track by stating "OK OK OK, I'm NOT saying I think it's OK." You cannot back up your claims, and you used that as a means to avoid having to.
"Hiding? Come on, they're not that stupid - no country could do this and openly admit it as the US (plus the UN) could crush any other 1 country (not that a country was directly responible for this)."
The U.N. has no power other than that provided by the governments that make up the U.N.; beyond that you are correct. That is precisely why those that are responsible for this are hiding. They are cowards.
"I do not in any way think these attacks were morally right"
You think whether the actions were "wrong and sick" is "opinion," but then you declare that you do not think "these attacks were morally right." So you think morality is the realm of opinion. You're one of the middle of the roaders who appease such barbarians, by making it possible to excuse their actions on the grounds of: 'sick? wrong? twisted? oh but that is just silly opinion.'
It's a variation of the "don't judge!" argument.