The story: In parallel with Iran’s regional diplomacy, officials and hardline media in Tehran are warning Israel of a major escalation and “mass deaths” among its troops if Gaza is invaded. This comes as the Islamic Republic is additionally hinting that “preemptive” action may be taken if an Israeli ground incursion materializes. Against this backdrop, an online campaign has been launched in Iran asking for volunteers to fight Israel.

The messaging: In an interview with Iranian state media upon his return from a regional tour of Iraq, Lebanon, Qatar, and Syria, Foreign Minister Hossein Amir-Abdollahian warned Israel of possible major...