Netanyahu and Iran’s hardliners think new wars might stop the third front. However, global public opinions are shaped during conflicts. The necessity to make those protests more organized will then become apparent. So any new conflict will expand the third front. Terrible for Netanyahu and hardliners in general in the long run.
Legitimacy will strengthen the position of Iran’s hardliners at the time Iran should decide how to respond to war threats. It’s essential that Pezeshkian’s supporters make it absolutely clear their stances will not legitimize hardliners’ approach.