WP burns yellower, and magnesium is very rare because it's expensive and complicated. WP auto-ignites in air, magnesium has to be separately lit by the delivery system. You can't practically put a magnesium incendiary in an artillery shell, what you see in Gaza is mostly artillery.
And suddenly switching to magnesium would be an absolute psycho move. The way you treat a WP burn is pouring tons of water on it, magnesium explodes on contact with water.
Israel's peace treaty with Egypt after the Yom Kippur War gives Israel control of a 100-meter wide buffer between Gaza and Egypt. So it doesn't open its borders because it doesn't have one, just a border with Israel. A later agreement gave Egypt some limited control over the buffer zone, so there are Egyptian guards in charge of the border crossing now, but they can't do whatever they want.
WP burns yellower, and magnesium is very rare because it's expensive and complicated. WP auto-ignites in air, magnesium has to be separately lit by the delivery system. You can't practically put a magnesium incendiary in an artillery shell, what you see in Gaza is mostly artillery.
And suddenly switching to magnesium would be an absolute psycho move. The way you treat a WP burn is pouring tons of water on it, magnesium explodes on contact with water.