The camp could just as well be in Kansas at this point for all that the law is concerned (just where we kept German POWs back in the day), the detainees wouldn't get any substantive additional rights.
Likewise, unless you can show that Israel is deliberately targeting Palestinian non-combatants then there's not going to be an international legal basis for sanctions. That certainly wouldn't stop individual countries from applying sanctions if they wish due to their own norms, but that's arguably a double standard as by that logic the world would have to sanction essentially everywhere but western Europe and maybe Canada.
Iran can have peaceful nuclear tech, it's explicitly permitted by the Nuclear non-proliferation Treaty. If you seriously think this whole thing is just about turning the lights on in Tehran you need to pay more attention to this issue.
Even the Western media doesn't refer to DNR/LNR as "terrorists", but as "separatists". They don't even simply call them Russian puppets either, they're always referred to as rebels or separatists of DNR or LNR, and only then possible ties to Russia mentioned. The one time I did see "terrorism" bandied about regarding either DNR or LNR, a Malaysian Airlines Boeing was burning on live TV...
Where is "ethnic cleansing" going on in Ukraine?