Your comment relies on three basic assumptions. The first is that the US will intervene militarily to defend Israel. The second is that a military threat to Israel (ex: a blockade) would need military collaboration from Sunni Arab states. The third is that the Sunni Arab states that have relation with Israel do it from direct self-interest.
None of those are truths you can rely on right now, let alone for 1-2 generations.
It's doubtful that the US, should Israel really fly off the handle, would be willing to intervene against a nuclear state - it hasn't in Ukraine despite much more favourable circumstances. As time goes on and the balance of power shifts away from the US this will become more and more true. Additionally, the US cannot militarily stop antiship missiles even at a relatively small scale, so the only intervention that would be guaranteed to work would be an invasion of Iran, which if it had nuclear weapons would probably not be undertaken.
Secondly, there is no need for cooperation from any Sunni Arab state. In theory, all it would take would be missile launches from Iraq, Syria or Lebanon to shut down traffic to Israel from the Mediterranean - that would be enough to basically collapse the Israeli economy, as it would not be economical to ship overland from Egypt or Jordan, even if those countries would be willing to collaborate (and they might not).
Thirdly, no Arab country has diplomatic or economic ties to Israel out of the goodness of their heart. They only do due to massive pressure from the US, who either gives diplomatic concessions in exchange (ex: recognition of Western Sahara) or hangs the military umbrella (Saudi Arabia, UAE). This is not something you can bank on when shit hits the fan, let alone for the next 1-2 generations.
At the end of the day Israel's strategic situation is extremely precarious and is completely dependent on foreign powers who not only have greatly waning influence and relative capability, but also declining sympathy. This used to also be true, to some extent, for it's neighbors, but it isn't anymore because Iran managed to make its own sanction-proof and relatively competitive MIC. In the future, Iran might not even be the only state in the region to manage such a thing, and structurally any state which aims to do this aims for strategic independence, and a state which is strategically independent doesn't have much of a reason to be sympathetic to Israel right now, let alone in the situation you presented. Additionally, it's not unlikely there will be nuclear proliferation in the Middle East, which will greatly weaken Western influence as Western nations will oppose proliferation and because states which attain nuclear weapons are no longer reliant on the US for defense.