Actually, what struck me about this -- and I have followed it from the beginning when it happened last week -- is that unlike past assassinations (presumably) by the Israelis, this one seems to have left too many tracks behind. Usually everyone knows it was the Israelis, but there is no proof, they don't confirm or deny and there is no trail of anything pointing toward anyone.
Immediately on this one, they had passport numbers, names (fake names, but ones that belong to real people) and video footage and photos of the killers. This was a professional hit squad, but they seemed kind of amateurish as far as those things go because the Dubai officials have plastered their photos all over the Internet. Also, many of the names they chose for the passports belong to dual-nationals with ties to Israel. One was a guy who lives on a Kibbutz, is in his 50s and has had bipass surgery. The mere fact that those people's lives have been screwed up over this -- they now have warrants out for their arrests -- makes this anything but clean.
It is leading some to speculate (and who knows) that the Israelis weren't involved in this and some other government or organization purposely chose names with Israeli ties to try to set them up.
EDIT: The other explanation I have read is that the Israelis purposely chose the people they did for the forged passports as a way of telling everyone they did it as a warning, while still being able to follow their policy of non-comment/ambiguity.
Who knows what the real truth is. Whatever it is, it is interesting and kind of bizarre.