re: pulsa danura?
The Wikipedia article on this.
The anecdotal examples of a "curse" working are just that. I suspect that if any controversial political leader in Israel died or had something bad happen to them, it would not be hard to find SOMEONE who had cursed them in the previous period of time.
If this kind of thing worked on Bush, he'd be a puddle of protoplasm by now.
If only other religions restricted themselves to casting verbal attacks instead of suicide bombs, guns, and beheadings.