For a few HAMAS fighter? Not very likely.
And if they really do, then they probably would have done something already, you don't wait after the surprise is gone where the first strike is done and dusted, that does not make sense. And then you are talking about you need both Lebannon and Syria to get onboard, both countries already has enough of their plate on them, getting crowded in with Israel will undoubtedly draw US at least, if not EU and entire NATO attention. If NATO can't let Ukraine fall, you can bet million to donut NATO won't let Israel fall. Do Lebanon or Syria want NATO intervention in their area? Because that may be the result if they intervene on HAMAS behalf.