The assassination of Imad Mughniyeh

It's been over a week since the assassination of Imad Mughniyeh, one of the leading Hezbollah terrorists, and Mossad has taken the blame. I have no information if it was the Israeli government who killed this man but it seems they have already been accused by the Hezbollah leadership. In a previous post i proclaimed my support for these assassinations and i reiterate that once again.
This man was evil; his deliberate attacks on civilians led to an enormous loss of life not only within the Middle East but he is also believed to be behind the 1994 bombing of the AMIA centre which killed 85 people.
Whilst it would have been preferable to have this man face justice in an Israeli courtroom he was notorious for his paranoia; often changing his clothes, sleeping in separate houses every night and strangely having no bodyguards. He did this in order to avoid any kind of information being leaked to the various intelligence agencies that were hunting him.
However whoever did assassinate him did an astounding job (it was believed that the small explosive was placed in the headrest of his car-seat) and whilst i'm sure Israel did have a hand in it, it could not have been done without the support of their Arab neighbors. Hezbollah is a threat to the entire region with its tentacles, funded by Iran, being able to reach into Saudi Arabia, Egypt, Jordann and various other countries. This way why three Arab states openly aligned against Hezbollah (and by default, allying with Israel) in the beginning of the 2006 war.
Many of them are afraid of what would happen should Hezbollah and Iran get too strong (they're also deeply concerned about an Iranian nuclear weapon) and topple their regimes. Many, like the Mubarak regime in Egypt, are far from perfect. The Egyptian dictatorship has oppressed citizens and media alike and routinely imprison political opponents who wish for democratic change. However they are also funded largely by the Americans who have given this dangerous regime a modern and very deadly army. Mubarak and many other Middle Eastern governments are fearful of Hezbollah and the Muslim Brotherhood's influence in Egypt, for they could soon gain power, and so are hoping for their downfall.
Whether or not Israel planned this assassination is irrelevant. There are plenty of Arab states who wanted Mughiniyeh dead and they could have taken care of this problem themselves.