What you fail to address, don, is that Israel must abide by international humanitarian law that governs Occupying Powers. Shayah posted a false analogy with the example of Laredo, TX and the United States. The United States does not occupy Mexico.
Another thing you failed to address is proportionality, which is required during any use of force. These are key differences that renders your point completely invalid.
No one has suggested Israel has no right to self-defense, and it is pathetic for you to claim that anyone has proposed that.
Several quick things:
1. Shayah did not argue that Israel should be exempt from its obligations under international law. Every state, the U.S., Israel, UK, etc., has a responsibility to adhere to the Laws of War, etc.
2. Adherence to international law does not mean that one cannot make errors, etc. Errors can occur e.g., a shell could go astray, etc.
3. Proportionality refers strictly to the military's duty to refrain from attacking a military objective if civilian casualties from pursuing that military objective are expected to be excessive relative to the military advantage anticipated. Hence, if a terrorist is holed-up in a building and military planners, in good faith, expect let's say that the terrorist's family would perish if a missile were fired, the attack would be ok. If, however, military planners anticipate scores of civilian casualties would result, then the attack should be avoided. If, however, military planners anticipated only the terrorist's family would be harmed, but unknown to them, the terrorist had engaged in human shielding, and the attack claimed dozens of civilian lives, the fault would lie with the terrorist. The military planners had acted in good faith and had not expected civilian casualties to be excessive relative to the anticipated military advantage.
4. I used the language "further deprive" not "completely bar" Israel from acting in legitimate self-defense. In the message to which Shayah and I had responded, the author had conditioned self-defense as requiring that the survival of Israel be at stake in writing, "
Israel's survival is not threatened by Hamas and
it certainly wasn't threatened at the time Israel launched the Gaza War." Self-defense is not legitimate only when a state's survival is at stake. Attempting to restrict Israel to such terms is unreasonable and it is inconsistent with the norms and principles of international law.