Yes, Arabs would like Persians to “take out the trash (Israel).” Bad news is that for the Persians to have that capability also gives them the power to threaten every other regime in the neighborhood. Rational people would figure out that it’s not worth it. OTOH don’t count on rationality in the ME.
We underestimate their real-world strategical thinking at our peril. We call the mullahs “crazy” since 30 years and misunderestimate their moves and motives. They are EVIL, not stupid. They are about to cement their stranglehold on the region, while we guess and wonder what they are up to.
They play chess, we think they are juggling.