Jim, Syria commits atrocities every day, so why do you only and always attack Israel, which has committed none?

If an enemy repeatedly attempts to commit atrocities on a civilian population, their government has not just the legal right, but a duty to strike back at them.
Israel acted within the law to attack Hamas in Gaza.
Hamas, uncaring war criminals that they are, chose to make civilian areas a battlefield. Not Israel.

The use of WP smoke on the battlefield is perfectly legal, but even so I considered it reckless and deplorable in that instance (Gaza 2008).
Israel seems to agree and has not used it in subsequent operations, so lets move on to actual war crimes actually happening now.