This is straightforward antisemitism. Here is the problem with those who treated any accusation of antisemitism as a witch hunt: they ended up defend… - David Miller

Miller claims he suffered discrimination when he was fired two years ago because his anti-Zionism counts as a philosophical belief under the Equality Act. This is no mere critique of Israeli policy. Miller believes that Israel should disappear completely. "Our cause is not to establish a Palestinian state but to dismantle Israel", is how he put it. It feels like an appropriate moment to be asking whether such a belief can ever be, as the law states, "worthy of respect in a democratic society, compatible with human dignity and not conflict with the fundamental rights of others".

David Miller writes about conspiracy. Some academics analyze conspiracy theories and explain how they become a force in the world. Miller is not among them. He doesn't scrutinize conspiracies, he builds them.

David Miller's description of how the world works is a fantasy of Zionist conspiracy. In form it is similar to more explicitly anti-Jewish antisemitism. And when he talks about Israel's "time-honoured tactic", and in another article about an "age-old Israel lobby tactic" he inadvertently slips into a way of thinking that is much older than antizionism.
David Miller is not articulating a worry that Jews may be over-sensitive about antisemitism or about criticism of Israel. His position is that Jews who allege that there is antisemitism on the left, or on campus, are acting as part of a deliberate and collective conspiracy to lie.