If Iran gets nukes, then the major Arab States will rush to get them as well, and an arms race will emerge.
Privately, the Arabs will be happy. However in public they’ll curse Israel for attacking fellow Muslims, and riots will happen.
Bibi has carefully considered every possible scenario regarding the aftermath of a possible pre-emptive strike against Iran; and I assure you he will not hesitate to defend Israel, regardless of the Arab or International communities reactions to such a strike!
Who cares how they feel? what they think? This is a matter of survival...