From a practical sense, they don’t. The IDF has a history of protecting violent settlers who attack Palestinians and will attack those Palestinians if they try to defend themselves.
The US would absolutely not send defensive weapons to Palestinians. The US government is too close to the Israeli government.
Even at this moment the US says they don’t approve of how Israel is waging this war, while they’re using weapons the US sent them…
What do you mean by ‘there’s no open source scene’?
I don’t understand what open source has to do with this.