Of course, all domestic coalition formation in a parliamentary system like Israel's has a high degree of domestic content.
Thus, postponing the election that Prime Minister Netanyahu called for this fall is partly a function of what his Likud bloc and center right Kadima Party think is best for their electoral prospects, hence of course Labor's unhappiness.
At the same time, in this case a national unity government for Israel has to be weighed in the context of the Iranian nuclear program, which the author retains the belief as to the duck theory; if it walks like a duck...it's a duck, even a Iranian bomb in the basement to create Israeli doubt duck.
What is very curious about this coalition's formation is that it came just after former Kadima Prime Minister Olmert's speech in New York calling for caution in striking Iran, if also the call for talks with the Palestinians.
Without saying it, one opportunity one could see is for an implicit trade of some agreement for the Palestinians in return for some serious deal with Iran, although of course it is easy to be pessimistic about either one occurring.
Although the Israelis wouldn't want such things linked openly, at least too much, it has to be clear to them on average that just forcing Iran to back down in return for nothing is a pretty tall order, in which allowing Iran to be the hero a little bit, even implicitly, is worth some real risks of this coalition.
The risk of course is that a national unity government signals a consensus to go to war, which if a bargaining tool of great power, isn't of course risk free either.
But the opportunity is there for Iran and the Palestinians to acquire some things that they want through the arbitration of notes, unless in the end the Iranians most especially really want to see what the arbitration of arms in this case would look like, definitely not very pretty from their point of view, or maybe anyone else's either, in which it's worth noting Shaful Mofaz throwing out some respect to the international community as to seeing if bargaining really can work first among the Great Powers and regional actors.