The legality of weapons is decided by those countries who allow them to be manufactured and then sit in a meeting in Switzerland to ratify them.

Do keep up.

Legality is only ever based on defensive purpose. The oppression of Palestinians and Israeli formed barrier on Palestinian land is not deemed defensive. Hence the same meeting room hosted meetings censoring Israel.

Do keep up.

Neither Israel nor Hamas are working to war conditions that such conventions cover. Nobody outside of their internal deliberations sees this as war.

Hence nothing is legal under this conflict.

Do keep up.