Hamas went all in hoping that once all of the other Muslim nations saw their merry slaughter of Jews, they would happily and immediately join in and attack Israel from all sides to complete the attempted genocide. They forgot about or chose to ignore a few things:

Israel has nukes and would use them if they felt fundamentally threatened, Israel has conventionally defeated every army that has ever attacked them (if sometimes by the skin of their teeth), has made reluctant, but reliable allies out of some of their former enemies and crippled others. Hamas didn’t consider that Biden would protect Israel and fully commit to it, they kept the preparations for their attack so secret that only Tehran and Moscow knew about them, but crucially not Hezbollah (which ended up being muzzled by the American carrier groups anyway) and they gave nobody the necessary heads up for the months of buildup required for a full on war, because that would have given the whole thing away. While Hamas skillfully (with Russian and Iranian help) overcame the border defenses, they wasted the element of surprise on random carnage instead of overrunning the same airfields that have since been launching thousands of sorties that are, day by day, obliterating their organization.

And so on and so forth. The entire idea was foolish from the start and had no chance of success. Not that Moscow and Tehran expected any. They just used Hamas as pawns, hoping to weaken the US with this conflict. It’s the standard zero sum game that autocrats love to play so much.