Continuing my comments on anti-semitism, relating to AndHarry's post above.
Just to reiterate - yes, you can criticise Israel (government, army, policies, etc), as do many Jews and many Israelis, without being anti-semitic. These comments are about when the criticism turns into anti-semitism.
Example 4) - comparisons with the Nazi holocaust
Be careful with this one. There is no event in recorded history so far that is in any way comparable to the Nazi holocaust - in scale, in intent, in methodical thoroughness, in sheer gruesomeness. I accept that being victims of this event does not make it impossible for the Jewish people to commit atrocities themselves. But if the holocaust comparison is so very far-fetched, in fact no comparison at all, why make it? Is it not enough for the Jewish people to suffer this, but to go further by throwing the anguish back at them? Does saying that the Jewish people of today are equally guilty absolve the Nazi guilt and free critics from sympathy? Of all the nastiness bandied around, using someone's grief and loss against them is the worst.
Example 5) - allegations of genocide
Slightly different to the Nazi comparison. A look at the tragic casualty figures for this conflict, whilst distressing, do not remotely suggest genocide. Even where the Gazan casualties are women, children and old people, they have been incidental casualties caught in the exchange of missiles. No comfort for those grieving for the loss of beloved family members, but no genocide either. Had Hamas provided bomb shelters for its citizens, had Hamas not fired from civilian areas, had Hamas not built its command centre under a hospital, the casualty figures would have been undoubtably dramatically lower. Had Hamas not opened rocket fire on Israeli civilians in the first place, every one of those casualties would be alive now. But there is a further reason why allegations of genocide are particularly nasty. Because genocide is exactly what Israel's enemies publicly declare is their intention, if they ever manage to overcome Israel's defences. Iran, Hamas, Hizbollah and IS have all declared their intention to obliterate Israel and world Jewry. So while trying to prevent the genocide of its own people, Israel is accused of being what it is fighting against. Is this anti-semitic? I don't know, tbh, maybe it is just the hurly burly of war propaganda. But it is so inaccurate and twisted it feels offensive on a personal level.