Is PM on solid legal ground with his defense of IDF tactics?

This article begins thus:

'Is PM on solid legal ground with his defense of IDF tactics?
Citing Protocol 1 of the rules of war won't help when it comes to dead children, says expert, but Israel's 'careful' approach would be vindicated in a neutral court. '

The trouble is that the United Nations and other trans National bodies are not neutral with regards to Israel.

More here http://www.timesofisrael.com/is-pm-on-solid-legal-ground-with-his-defense-of-idf-tactics-in-gaza/