Israel won't be supported by America for too long dude. Whenever they're in a pinch, Israel calls American soldiers, and ask for peace. American soldiers come and act as a peace keeping force. Anyone who wants to harm Israel has to go through the American forces, but Israel still plays dirty and continues doing operation on the other side, like for example how they captured those 5 people from the hospital a few days ago, AFTER they've announced that the war is over. This is rude and tactless, but what can we expect from people he kill 1000 over the capture of 2 soldiers (which they never got back btw).
So the opposing side, naturally, will be pissed. And they'll want to get Israel back, with USA standing in the way, thus making USA their enemy as well. Basically Americans die in these wars because of Israels actions. Eventually the USA will wash its hands of such ingrateful people. France was supposed to send them support in this recent war with Hizbollah, but then decided they didn't feel like it. The supposedly strong ties are breaking, and you should see how Jews compalin on forums, calling the USA cowards for not helping them and such.
Also, the Israeli army is not good at fighting wars, though they think they are. But we've been shown in the 70's that they sucked when they had to call the USA for help when the Arab armies ganged up on them. Now look, they couldn't even defeat Hizblollah, and look at how long it took them to cover little distance, and accomplish nothing but kill civillians. Honestly, they lost their supposedly invincible tanks to missles from the hizb, and they also had one of their top secret undetectable ships blown up. They lost this war mate, everyone knows it. They went in, killed civillians, lost over a 100 soldiers, and left. They never even faced the true Hizbollah fighters, as those guys were deep in lebanon and were waiting for them to come. Instead they were fighting hizbollah reserves and volunteers that were quickly trained. The reason Israel didn't push any further was because they knew if they did, they would be fighting Hizbollah for real, and it would be a long and extremely vicious struggle.
And now, lets say that the 1000 people they've killed have an average of 5 relatives each, now you have 5000 pissed off people. If you read the article "Hizbollah proves a tenatious foe" on BBC (or was it CNN, I forget), one of the Israeli soldiers admitted that this is a war they'll never win. They're spawning more and more enemies, only a matter of time till their own actions turn against them, like they've always done in the past.
They can't win against a small group of millitants, what will happen when the whole Arab world decides they've had enough and unite against them?