the problem with all of these, “X creature is an antisemitic stereotype” is…
well, if they are, it’s a thoroughly recent invention
Christians didn’t need to come up with coded representations of the worst things they believed of Jews
they just presented it outright
we didn’t have “goblins hoard gold and control the banks”, we had “Jews hoard gold and control the banks and steal the Host and drink the blood of Christian babies and dig up our dead”
With the exception of impenetrable allegorical works that were just allllll about symbolism, from top to bottom… Notsrim didn’t need to invent some kind of fantastic monster to represent Jews
because to them, we’re already monsters
this isn’t to say you can’t talk about stuff in the context of specific recent creators
JKR’s goblins are grotesque little antisemitic caricatures, just as many editions of D&D made goblins into anti-Asian stereotypes
remember that there’s no One True Goblin Form. There’s no codified rule about dwarves being greedy treasure-hoarding foreigners, in spite of Tolkien. There’s no rule about how long or how pointy an elve’s ears are.
this stuff is all centuries if not millennia old. It’s gone through countless variations in how it has been told. Sometimes, to some people, “goblin”, “elf”, and “dwarf” were all names for the same thing. Sometimes one or the other was extremely specific. Sometimes they were each broad categories, more akin to something like the Japanese “youkai” or “bakemono”.
sometimes, people have sat down and decided to take these ideas and use them to conceal their hatred, to signal others who believe as they do or to try to make their bigotry seem less bigoted by making it about something nonhuman
because back when people were worried about elves swapping a changeling for their baby, or an ogre in the forest
they were also convinced that “Jew” was itself a category of inhuman creature.