Couldn't agree more. I posted yesterday that these guys are well paid (from Arab oil or Afghanistan\Albanian opium money) assassins. I don't think they are Muslim. Muslims have a tendency to either martyr themselves, screw things up, or claim credit. This guy is ex-military (spetsnaz?) as evidenced by the marksmanship, the use of only one shot, the well thought out get away, etc....He's definitely seen a lot of action as he has no qualms of shooting children. I would guess Russian. They will kill someone for $ 100.00 in Brooklyn. It might even be someone from the Yugoslavian civil wars where they used to take out civilians all the time. Just my hunch.
If it was me I would start asking firms that specialize in protecting overseas executives who the top assassins are. There has to be only a handful of teams like this in the world that would be willing to accept money for killing women and children, have the skill to pull it off without a trace, be willing to withstand the heat of a nationwide man hunt, and be well known enough to be hired by someone with Bin Laden like money and motive.
Very interesting point.