Isreal if I remember correctly had more UN sanctions against it then Iraq did... But the reason the UN didn't do anything about them is because they're the US's pal. Basically, as much as I hate to say it, it comes down to the US giving the go ahead before anything will ever happen. And unless Isreals lobby groups get very lax in their efforts, that won't happen any time soon.
As a small note in history, just about every person who has lead Hamas has been murdered by Isreal. About a dozen or so in total since the first european halocaust survivers arived in the area and declared independance from Palistine.
1500 Palisitinians killed by the isrealis verses 550 Irealis killed by Palisitinians (figures from amnesty international).
"This is not the beginning of the end, rather, it is the end of the beginning" Winston Churchill
To put it into this context, I think that until a third party steps in, or rather the US cuts Isreals funding (I can see that happening if Isreals tactics get much more unpleasant and the US media picks it up) it will only end with the destruction of one or both of the sides involved.