Because she doesn't place Palestinians and Israelis on equal moral footing. Fundamentally, she doesn't believe they both have an equal claim to humanity. This is obvious because she is proposing giving defensive missiles to the Israelis, but not to the Palestinians, who objectively are at much, much greater need of defensive military aid.

You cannot truly believe both Palestinians and Israelis are equally human unless you recognize they both have an equal right of armed self defense. The Gazans have just as much right to kill in self defense as the Israelis do.