One interesting issue in the current crisis is how come Hezbollah hasn’t acted aggressively to start up a second front in the north while the IDF is conducting major operations in Gaza. Abu Muquwama has some plausible sounding speculations about this. One could, I think, probably construct other scenarios. Part of the reason is almost certainly just status quo bias and inertia — on any given day, Hezbollah has a strong presumption against undertaking a dramatic escalation of the conflict with Israel.
But note that while one can adduce all kinds of reasons to explain Hezbollah’s actions, none of them are consistent with the (apparently popular in Israel as well as among US neocons) line of thinking which holds that both Hamas and Hezbollah are nothing more than puppets of Iran and extensions of Tehran’s relentless drive to eradicate Israel.