Hey great question, but Israel has already done this once flying 1000km over the desert there and back to take out the nuclear reactors, and if hostile countries try to take out Israel's aircraft then so be it. Last time Israel took on the entire Arab world it only took them 6 days to clean house!
Assuming they could muster enough aircraft to actually strike multiple targets at that distance, how likely are they to get back?
Please be specfic on which countries you think will allow overflights to the returning IAF.
Oh, and welcome to FreeRepublic.