Ukraine has a civilian nuclear program; why can't Iran have one? The sanctions also include the missile program, which denies Iran the right to improve its army for defense and restricts dual-use materials, affecting civilian projects as well. Trading with Israel also helps Israel kill people throughout the region.

Furthermore, without the West making itself the enemy of Iran, Russia would never have acquired Shahed technology. By continuing to be stubborn, the West ensures Iran will get even closer to Russia, not the opposite.

What I am advocating for is the renormalization of relations with Iran to limit Russian power; what you are suggesting is vengeance that will only hurt Ukraine, not Russia. With a vengeance mentality, one could justify First Nations in Canada helping to murder the descendants of settlers, or Africa assisting in the murder of civilians from former colonial powers.