The prime way that anti-Semitism spreads — as in many other oppressions — is by word of mouth. That’s why maligning is not merely semantics.
“Sticks and stones can break my bones but words can never hurt me” means: if you have enough a sense of your self-worth, insults don’t bother you. That does not mean that words can’t hurt or even kill.
Bullies use words especially against people who never were given a chance to build enough self-esteem. And they often don’t keep it at words. Mean words therefore generally hurt. Thus, Jewish Law outlawed the use of them.
Now, “decent” “educated” people learned how to be politically correct, avoid using wrong words. Prejudices and worse come out encrypted. So, some people use “Rothschild, Cohen” as dog whistles, codes for “Jews.” The Rothschilds have messed with our weather, news, money again.
Mel Gibson went from famous to infamous when he shot a movie on the last day of Jesus that was so gruesome that it was feared to ignite the anti-Semitic stereotype of Jews as “deicides,” killers of G^d [sic]. He dismissed the concern. He did nothing wrong, supposedly and wasn’t worried.
But, when the wine is in, the wit is out. So, when he was stopped for drunken driving, he started cursing one of the police with anti-Semitic slurs. He was shunned by many since but vowed to restore his reputation.