What's hard to understand about that?
And what's wrong about that?
If you said something antisemitic, don't add to it by calling me a childish troll - as recently happened here on Newsvine, in a case that points out the hypocrisy and double standards in the implementation of the Newsvine Code of Honor. If you say something antisemitic, it's not likely to violate the CoH call for respect or the User Agreement's ban on ethnically or racially offensive speech. I don't know how that manages to be the case, but it evidently is. On the other hand, if you say something antisemitic, I'm not allowed to call you an antisemite, because that would be a personal attack. If I point out that you've said something antisemitic - no matter how respectfully - you can call me a troll, or childish, or even a fascist, without fear. That, evidently, is not a personal attack.
What's truly most remarkable about those who refuse to have their writing called antisemitic, even going so far as to write articles explaining why they feel perfectly justified to exercise complete censorship (effectively against Jews), is they never discuss whether something is antisemitic or not. To them, it doesn't matter if what they wrote is antisemitic. All that they care about is whether that they can go on without the threat of being challenged. The arguments they make, defending their right to use antisemitic speech without fear of honest debate, do not even depend on whether they effectively claimed a right of self-determination for Palestinians while denying it for Jews (an antisemitic position) or shouted "kill the hook-nosed Heebs." Actually, they argue that so long as no one points it out, it wasn't antisemitic in the first place. It's not the sentiment expressed, but the Jew who gets offended who causes the problem.
And then they get self-righteous. So offended. "Raw." Sorry, but if you say something antisemitic, I'm the one with a right to be offended. (And yes, I get offended, but I still usually manage to make cogent arguments that don't get addressed.) Ask me why I'm offended and we might have a fruitful discussion. Ban me for life, well, that's just wrong. It's as childish as refusing to go to the doctor because you might find out you're sick, but the consequences are far worse.
There's a debate in Holocaust Studies over how much the average German knew about and supported the genocide. The average German didn't know, but they should have. This isn't a uniquely German failing, but a human one, and it behooves all of us to try to learn from it. It was obvious in Hitler's rhetoric, which talked of war against Jews. But most Germans closed their ears. We often hear about how no one had the courage to stand up against the Nazis until it was too late, but the truth is more mundane. No one put the thought into it. When "they came for the Jews" people rationalized it away. Even until 1941, there were some people still debating whether or not antisemitism was a problem in Germany. Even the average Jew downplayed the problems until Kristalnacht, in 1938, 5 years after the Nazis rose to power. The Jews were made to pay for the damages from Kristalnacht's anti-Jewish rioting. Too many Germans felt that was just. If there was a problem with antisemitism, they argued, the Jews had brought it upon themselves. The average German heard the calls for genocide and simply ignored them because to do otherwise would have required self-reflection.
So know this: You can feel secure knowing that, in this time of rising antisemitism, you've done nothing to combat it. You've even encouraged it. When circumstances lead to tragedy for Jews - and if this sort of debate is any indication, it surely will within my lifetime - you'll be able to feel safe, knowing that you never stuck your neck out to combat it. And you can always claim that the Jews brought it upon themselves. If they'd only kept quiet, they'd have at least escaped the worst of it.
Or do you not want to be that person? Then when someone says something you wrote is antisemitic, take them seriously. Ask why. Don't just close your ears.