According to Memri, the child replies: "We will annihilate the Jews."

The sound quality on the clip is not very good, but I have listened to it several times (as have a number of native Arabic speakers) and we can hear no word that might correspond to "annihilate".

What the girl seems to say is: "Bitokhoona al-yahood" - "The Jews will shoot us" or "The Jews are shooting us."