"A great victory" and a "pivotal point for Lebanon" — that was how Naim Kassem, the leader of Lebanese group Hezbollah, described on Wednesday the memorandum of understanding that stopped fighting between Iran and the US this week.

Kassem also thanked the Iranians for "linking the Lebanese arena" to the deal and "forcing Israel to stop its aggression."

Hezbollah was founded in 1982 with support from Iran, and one of its primary aims then was to...