One does not require advanced weapons to kill women and children. All you need is tractor, suicide belt or even a knife will do. Secondly if they are prisoners of war then you admit we are in a state of war with them and can hold them without a trial until the conflict ends. That could take quite a while.
U.S. sanctions Russia's state-owned arms exporter Rosoboronexport (Reuters)
from the article: For Israel, punishing Palestinians is not enough