Yes, Israel used White Phosphorus against targets in cities. Use of White Phosphorus in populated areas is generally accepted as unacceptable. What does that have with 'half a million children"? No where near 1/2 million, or 50,000 'children' were injured by WP. Indeed your off by SEVERAL orders o f magnitude in your accusation.
ISIS claims responsibility for bombing in Baghdad suburb; death toll hits 21 (Reuters)
from the article: Hamas: Goldstone retreat doesn't negate war crimes committed in Gaza