Violence erupts in Israel as tensions simmer after rare airstrikes on Lebanon
NBCMAY 2023
Considering Israel and Iran's current military posture in the Levant, it would be unsurprising if this incident was, in fact, the result of Israeli airstrikes. The PFLP-GC's existence is predicated on support from Syria and, to some degree, Iran, thus making it a favorable target for the Israelis.
Though it's surely not a bad thing when Iranian-backed terrorists whose only goal is to destroy the Jewish state are killed, Israel had nothing to do with this. Even Lebanese and Palestinian sources admitted that the blast was caused by human error.