This is just my opinion, but as far as I understand it Iran can't quit the war unless it gives massive concessions to the people who bombed children and their leadership on the first day of the war DURING NEGOTIATIONS. You can't opt out of it because the US and Israel clearly won't accept anything less than neoliberal policy under a puppet regime, they certainly won't let a socialist government take power. So I believe the logical conclusion for socialists within Iran is to defend their country and people in a platform of national unity. Showing up in the defense of regular people is necessary for regular people to see that socialists actually care about them not dying.