This is interesting but not new, since he made the same point in his UN speech.
What is new is that in this audio, Hill accuses Israel of poisoning the water of Palestinians.
The slander that Jews poison the water of non-Jews is a classic antisemitic blood libel that Jew-haters have been pushing since the Black Death of 1348.
Hill is not only accusing Jews of poisoning the water but also of deliberately murdering Palestinian children.
If a far-right personality would say these things, the Left would be merciless on how this is absolute proof of antisemitism. Guess what? This is bona fide proof of Marc Lamont Hill's antisemitism.