Israel's response to the killing of children in Majdal Shams – reportedly caused by a rocket launched by Hezbollah - appears to violate the rules of engagement which both sides have largely followed, even after 7 October and the war in Gaza.
These rules have been intended to prevent cross-border skirmishes and missile strikes escalating into a broader, more destructive confrontation.
The assassination of a Hezbollah figure in the southern suburbs is not without precedent, following the earlier targeting of Hamas official Saleh al-Arouri.
However, there is reason to believe that this latest Israeli action signals a potential escalation and a departure from the previously observed unwritten understandings between the two sides.
After the Israeli airstrike on the Iranian consulate in Damascus last April, which claimed the lives of several senior officers, Tehran responded with calculated precision.
Their aim was to maintain dignity without inciting a violent Israeli retaliation that could spark a catastrophic chain reaction. Iran even announced the timing of its drone and missile launches, along with the expected time of their impact.
That night concluded with both sides claiming victory. Two days later, Israel retaliated by bombing the radar intended for air defence at one of Iran's sites. Once again, both parties were able to maintain their dignity after the event.