Opening with the identity trick weakened everything he said.

Quoting one bit of Arendt does not erase her criticism of Israel.

He is simply wrong about Arendt abandoning Heidegger. Their relationship resumed around 1950 if I remember correctly.

He ignores the fact that Nazis questioned Heidegger’s commitment to antisemitism.

A Guardian article about the notebooks has a reasonable conclusion: “Other philosophers have argued that the new revelations do not amount to a "smoking gun" of antisemitism, and should not lead to a dismissal of Heidegger's other writings even if they did. "Philosophy is about learning to be aware of problems in your own thinking where you might not have suspected them," said the British philosopher Jonathan Rée about the black notebooks."The best of what Heidegger wrote – indeed the best of philosophy in general – is not an injunction to agree with a proffered opinion, but a plea to all of us to make our thinking more thoughtful."”