Just because you make an A+ poster and shout loudly doesn't change the official definitions of a word.
I'm not sure what's worse;
1. Trying to rewrite a known word like #1984
Or
2. That if this person spent 2 minutes looking up the official definition of #antisemitism they would probably see how very wrong they are.
Please at least read your official documents before telling #jews what is or isn't offensive. ☮️