Call your lawyer as soon as he gets out of law school: https://medium.com/lessons-from-history/israel-vs-hamas-war-crimes-genocide-and-the-invention-of-intention-445975418168

And read the UN statute. Civilian objects are protected only when "undefended."

A hospital storing weapons is...an armory.

An UNRWA school with tunnels under it becomes....a command post.