It's quite a worrying situation indeed, not sure how far it',ll go but a lot of innocents on both side are on the line and it reeks: If Iranians would want to send some help for Gaza, normally I would be ok with it and I would also be ok with them being angry if their convoys would be attacked. However, as Bilbo stated, their President is a freak, the kind of freak you can't but have to take seriously because of the power he has but the very last man who should seat anywhere near power. I imagine that after the stupid war Israel waged on Lebanon, obliterating the country but being kicked out badly by a Nasrallah, losing more soldiers than the Hezbollah lost men and getting 16 tanks destroyed on top, The Hezbollah could be keen in kicking them in the teeth... I guess that Syria and Iran wouldn't mind a little help after having been bullied for years and Turkey, if they do not provide help, won't let the american use their territory to help Israel if needs is there....
I don't think that Israel would use the nuke though because they know that if they do that, there is no more Jerusalem on the map but nastiness can be titan like on both side... Bad time to live in the Middle East I tell ya.