They must know that the support for Palestinians by neighbouring countries has only been limited to lip service by most Arab countries for decades. They're all too happy to buy Israeli tech to spy on their own populations, that's basically the bargain they made to stay in power.

There's basically only Iran and Lebanon that are actual "allies", and that's basically more Iran using those groups to make things difficult for the US, and not anything that would actually help Palestinians.

Has it ever occured to you that maybe, just maybe they wanted to fight back instead of slowly getting erased? There is no 5D chess going on here, its incredibly simple.