leaving aside all the talk of the mistakes that Hezbollah made. Nasrallah was one of the very few leaders in the entire muslim world who had basic human decency. all other muslim countries chose to either sit & just watch 2 million muslims get genocided or even worse some (like Egypt & Jordan) chose to strengthen their economic relations with Israel while Nasrallah basicaly chose to give up his life for the Palestinians. frankly it's not just the governments but I would say even the muslim people have failed. almost the entire muslim ummah except groups like Hezbollah have been exposed as one big sham. we have seen the value that most muslims put on the lives of other muslims, and that value is unfortunately zero.
it appears the only time the Muslim "ummah" moves is when the US wants to overthrow a foreign government or start civil unrest in another non western country.
Hezbollahs whole raison d'etre and legitimacy lies with its claim to be an anti Israeli resistance movement . So if ut didnt do anything symbolic to show this when Israel Invaded Gaza after the 7th october attacks then it would lose all legitimacy and militant group a d organization as a while and this will affect her ranks as people will be reluctant to join the group in future. So Hezbollah had to be seen to be doing something. Note that they didnt do anything drastic or groundbreaking against Israel because they jave been trying everything to avoid a conflict with Israel due to obvious reasons. The problem is that they underestimated Israel's resolve and thought that Israel wont overract to some small isolated missiles being launched in northern Israel though there was barely any casulaty. So they didnt think Israel will launch such heavy attacks against them and even a now possible ground invasion, since they believe Israel wont want to start another conflict when they are already enegaged in Gaza. However they miscalculated Israel's response and capabilities.
Secondly, you cant say Hezbollah is the only muslim organization that cares about other muslims. Lol Seriously? Then why did they get involved in Syria to help the Assad dictatorship in suppressing the Syrian revolution? Lol They did so not because they thought it was the moral or right thing to do, but because it served rheir interests and they reluctant on Syrian support to fery their weapons from Iran , not because they cared about the Syrian muslims being massacred. Lol So we should stop looking at things here from a black and white perspective. There is no such thing in the region. Every actor has their own selfish intersts at play and i don't blame them. Its how the real world works. Realpolitik..lol
So we if we are talking about caring for human lives(or Muslim lives in particular like you seem to allude to) then we would have expected to see the same level of outraged at the syrian regime for their actions in Syria no? Or the hundred of thousands of people who died and are dying in Syria are not muslims enough? Or its not that bad since they are being killed by a muslim regime? More have died in Syria war cauaed by Asaad dynasty than Israel can ever wish. That's the ironic thing. Yet we don't see similar outrage or movement against this. Weird.