Why.....>>>>???? The church?
First of all, many American Jews do not support Israel (Hollywood and the Left to name two general areas), secondly, the Vatican is not anti-Jew nor anti-Israel (I am not Catholic BTW), thirdly, while the Vatican may be saddened by the deaths in Lebanon, they are equally sadden by deaths in Israel (I suggest there has been some selective and biased reportage). Lastly, the Pope isn't going to throw his weight (and it is great indeed in a moral sense...he's a great man) behind any side of a war unless one side is clearly identifiable as "purely evil."
IMHO, of course.