A friend from Israel put it pretty bluntly a few days ago, and he’s admittedly biased because his son (whose wife just gave birth to their first child, his first grandchild) got called up - There will be a very high price to pay down the road and they are creating some long-term security issues for Israel at a time that they are stretched thin.
My view is similar. They’ve bombed Iran, a nation of 90 million people, Syria, over 20 million people, and then the fuckery with the Palestinians. Now Iran and Syria, as nation-states, aren’t going to do much to Israel. But there are a lot of religious and political leaders in both countries who talk a lot of shit about Israel, and Israel’s actions in Gaza (and Iran and Syria) are playing into their hands, and allowing them to say “see, we’ve been telling you for years that Israel wants to rule over the Arab/Muslim/Persian world and wants to kill many of us!”
And the next-door bombing in Syria, and the starvation in Gaza, are creating a lot of young Muslims in the area who are going to not only agree with these religious and political leaders, but who are going to feel like they don’t have a lot to lose and will take action, either on their own, or joining a group like Hamas.