While everyone is trying to pin this on Mossad, the main question is why would they commit their resources to such a relatively insignificant person. Mossad could just as easily have spirited him off somewhere. Unless of course he was in possession of... or perhaps other assassins from other groups with other interests were involved. Unlikely anyone but those who hit him will ever know for sure.
Bin Laden's family killed in private plane crash in England, officials say (AP)
from the article: Hamas man's Dubai death was a Mossad-style execution