Till,
People love to exaggerate on the internet. I do it all the time myself. It's either that or animal loving wackos.
I'm not an "animal loving wacko" nor am I exaggerating when I say this: the guys acted stupidly and the tiger simply did what tigers do. So it was all THEIR own fault - not the tiger - and they paid the price for their sheer stupidity.
Question: would anyone fault the machine if some idiot rammed his arm under a running lawnmower? (I didn't think so.)
Another thought just crossed my mind. Those jerks probably spent time watching things like "The Lion King" and thought all animals were noble and harmless. Brainless kids!!