Hamas was voted-in. The last election the Palestinians were allowed. There's no certainty that this would happen again. Most of the Palestinians living today have no memory of ever having voted, because of Hamas.

If Hamas won again, it would be bad for the reasons you state. Then Israel would have a decision to make. As it is, there really is no decision that I can see. They are on a path for the elimination of the Palestinian problem. I don't see a middle ground. Take a chance on peace, or finish what you started and displace them all (killing most of them). As you said, and I agreed, there isn't really a good solution given all the history that is behind this.

It would result in all-out regional war - a horrible outcome for everyone, including Israel.

Iran pretty much couldn't touch Israel. Their air force is no match, and their navy wouldn't last very long if it steamed into the Med. And their army is several countries away. Probably just some missiles. Lebanon and Syria are closer proximity, but also weaker than Iran. If they could invade, why haven't they already? Hezbollah is entrenched in Lebanon. I suspect it's because they know they'd get wiped out.

Still pondering the scenario. Yes, I do agree there would be repercussions. Just not sure how they would fall out. As long as the clerics rule in Iran, they will be anti-Israel (and anti-USA), regardless of what the people actually want. And Hamas, Hezbollah, and the Houthis will continue receiving funding and equipment.