And yes, it does have the right to defend itself. Perhaps they should send their armies into Gaza Strip to defend their country
I... what? March them across the intervening Israeli territory, so they can engage with the IDF once they arrive in the Gaza strip? Something tells me that wouldn't be the totally logical and good successful step you seem to be suggesting it would be.
So... getting away from the back and forth, I have a feeling that the underlying thing you're saying, that Hamas is a violent terroristic organization and they shouldn't have killed or raped all those people at the music festival, I agree with completely. Where it breaks down for me is:
Likud has been helping Hamas defeat their less-violent domestic opposition, and elevating the most violent and unreasonable element in Palestinian politics, for years now. Which kinda makes it weird for them to all of a sudden get upset that the Palestinians are acting violent and unreasonable. It's like picking the worst and most dangerous dog to take home to your family, then torturing it on purpose because it's a "bad dog," and then blaming someone else when it mauls one of your children, and saying everyone needs to put you in charge and never question you so you can protect everyone against these dogs and keep torturing the dogs. To me, that shit means you should never be in charge of anything again and should maybe be brought up on charges both for what happened to the dog and what happened to your kid.
Any violence Hamas has done to innocent Israelis, the IDF has done to innocent Palestinians ten times over.
To me, no one should get raped at the music festival and no one should watch their children starve. Both of those seem like straightforward things to believe. Anyone on either side who's for a realistic path for peace is the the ally, and anyone on either side who's justifying atrocities is the enemy (as you seemed to do for deliberately starving children -- saying that it happens by accident sometimes, as a way of excusing Israel doing it on purpose, is deliberately missing the point of what I was saying I think.)
I think Hamas leadership and Likud are both guilty of perpetuating the conflict and killing the innocent, and a good solution would be to get the lot of them out of government, bring them up on charges, and find some people whose solution to "they did an atrocity to us" is something other than "Let's do an atrocity to them*! It is justified and will totally fix things because it'll show them not to do that again."
(* "them" being very loosely defined and including a whole bunch of innocent people)