You can
amost guarantee it!? Wow, I had no idea your an insider in the pirate trade!
From what I've been reading, it's beoming more like organized crime, than anything else. As for what happened in this case, they had been negotiating with the surrounding US warships for hours, maybe days, when the killings occured. The pirates had even sent a couple of representatives to the USS Enterprise. So, I highly doubt that the killings had a religious motivation. More likely, the hostages attempted to escape, or there was an argument amongst the pirates. If there was a religious motivation, they would've killed them right away.
From what I also read, the countries they (hostages) were visiting weren't exactly hot beds of Islamic fundamentalism. They were just heading for the Suez canal, which is why they were anywhere near Somalia.
The US is looked at as "evil incarnate", because of propaganda. It's easier to blame somebody else for your problems than to accept responsibility yourself. That said, US support for authoritarian regimes that oppress their own people doesn't exactly help your image either. Just sayin'....
If there was a functional government in Somalia the piracy would quickly go away. That's because we would have somebody/something to point a finger at and attack, if they didn't stop the piracy. Right now, it's a game of whack-a-mole and there's nobody we can lean on to make it stop.