I can’t see where a destabilized Iran would be a good thing. Look what happened in Libya, Iraq, and Syria.....ISIS will have a new haven if there isn’t a strong-arm government.
A destabilized Iran, no. But the Iranian personality is more balanced than the Arab. They’ve been civilized for millenia before the coming of Islam and then the Mongols, and they don’t stay destabilized for long. Somewhat like the Chinese. As such, they might just turn out alright when the dust settles.