Jewish Israelis and Jewish diaspora largely support military action against Iran, to eliminate nuclear threats, missile capabilities and potentially overthrow the regime, comparing it to Purim or fighting biblical enemies like Amalek. In general, Jews support military actions, considering them essential for national security and as a multifaceted strategy by Israel aimed at weakening the main pillars of the Muslim Brotherhood, both in terms of military power (Iran) and to reduce its financial power, targeting Gulf oil and also the profits of Latin American drugs which tend to be dismantled by the US.
Yet, a growing minority of Jews considers the war a mistake on several levels. It is not possible to invade a country the size of Europe. Global economic disaster. Long-term political strategy. Jewish prudence would advise that the priority should be to restore the good understanding with the Persians that has lasted for centuries.
The leadership of Persian Jews (16,000) believe that the radical Sunnis will eventually become extinct due to the very nature of the Persian people, who are frankly antagonistic to them; and the leadership of Russian Jewish community (350,000) guarantees that as long as the Federation retains its current president, Iran will never be allowed to target Israel with nuclear bombs.
A war with Iran is carrying severe consequences, including massive global economic disruption, the potential for a large-scale regional conflict, severe humanitarian crises, and long-term environmental devastation. Conflict risks forcing millions into acute hunger, damaging vital infrastructure, and causing massive displacement. Many recall what preceded the destruction of the Second Temple by the Romans, because dissension between opposing Jewish factions led to the burning of their own food stores, which led to widespread famine and easy entry of the Roman army into Jerusalem.
Besides, the Iranian regime might survive, leading to a long, drawn-out conflict with severe casualties for all sides. Warfare with boots on the ground is not viable, given the immense size of Iran and the entrenchment of its army, which can mobilize 4 million men. The memory of what happened in Vietnam (15 years), Afghanistan (20 years), Ukraine (4 years), and even Gaza (2.5 years), shows that even the strongest armies cannot achieve simple victories against indoctrinated peoples and military preparedness.