Clearly it doesn't shut down discourse since people are still discussing it.
And yes, it is anti-Semitism when the one Jewish state in the world is always, always assumed to be bad actors, while every other country in the world is allowed to have friendly fire and accidents. 37 Afghanis die when an entire wedding is bombed? Sorry, mistakes were made. Ambulance workers in Libya die even though they painted the roofs of the vehicles pink to ensure that didn't happen? Whoops, our bad. Aid workers killed? DELIBERATELY TARGETED BUT NO 'INDEPENDENT' INVESTIGATION WILL EVER PROVE THAT BECAUSE OF COURSE ISRAEL WILL LIE AND COVER UP THE TRUTH.
Israel is never allowed to make a mistake. Its actions are deliberate, sinister, and genocidal. And when these actions are proved not to even happen (hospital bombing) - oh, handwave that away because it's just an attempt to distract from all these other deliberate actions!
Everything Israel does is wrong because Israel itself is the malevolent actor standing offstage twirling its mustache and cackling.
And that's why it's impossible for so many people to admit that women at a music festival were raped and mutilated (#metoo unless you're a Jew!), or why it's wrong not to give back the hostages who've now been held for nearly six months (if they're still even alive), or even to acknowledge that maybe Hamas had something to do with this, even a teeny little bit. Admitting these things means you can't cast Israel as the pantomime villain you can hiss at whenever they walk onstage. Giving Israel an ounce of sympathy means that - ZOMG! - MAYBE THEY AREN'T ALWAYS WRONG. And that can't be allowed!
Israel is evil and its intentions are always bad. When they say they made a mistake, it's just proof that they are even more evil than previously thought, because they did a bad thing and now they're pretending to be sorry.
And since I'm sure I'll be labelled as a psychopath - no, I do not want aid workers killed, or aid deliveries to be stopped. But it doesn't matter what I say, because I am clearly evil, since I am not denouncing Israel.
Hell of a lens to watch this war through.