The money quote:
After all, if Israel’s actions are justified, would not US forces deployed on the Mexican border be justified in opening fire on refugees walking toward US territory? Would the European border police not be justified in sinking boats of migrants fleeing to Europe?
The answer to both of these questions would obviously be yes. The universal defense of Israel’s actions makes clear that the imperialist powers have adopted the mass murder of unarmed civilians as a legitimate policy tool.