I can go on, how about you watch this in the news:

A bunch of guys robbed a bank, are holding everybody inside hostage, demand two million ransom, it's a big bank in the middle of say, New York.
After some bargaining the police goes in, bank robbers give up, noone was harmed, the policemen bring them outside in handcuffs.
Next they make them kneel down in a line and shoot every single one of them in the back of the head.

Is that the kind of justice system we want to live in or that we want to propagate around the world?
To me it sounds awfully like what you'd expect from countries we constantly criticise for their lack of humans rights and subsequently call worse than ourselves.
And the bank robbery with hostage situation is the closest thing to this kind of piracy I can imagine, yet we do not execute them.