You're welcome. It should be added that there is a right of a state to defend itself from military agression. So of course Israel does have the right to defend itself from Hamas or other attacks on its people. This is relevant in the scope of conflicting rights, as Hamas has no right to attack civillians.

So this is not what the "state x has a right to exist" argument is about. It is used and needed to justify the continued denial of the rights of the Palestinians.

It remains an argument of might makes right. Imagine the US would say that the native Americans wanting their land back would be an attack on the US right to existence.