I've seen your posts and would like to chime in, if you don't mind. Overall I think you could argue JK Rowling is pretty ignorant, as old white women writing in the late 90s tended to be, but not intentionally anti-Semitic.
This is a bit of a low-effort explanation but one of the bigger dunks about Harry Potter in virtually all online spaces is that the series is anti-semetic due to it's portrayal of Goblins in the series. Goblins in the Harry Potter books and movies (including fantastic beasts):
have pointy ears and are fairly non-human
run Gringotts, aka the magical bank
The series has been widely derided (mostly as of a few years ago) as being anti-semetic due to it's portrayal of goblins apparently matching many jewish stereotypes (chiefly that they run banks). And in a vacuum this criticism does make a decent amount of sense.
I guess my main problem with the logic of this critique is that it assumes that JK Rowling was basing goblins off jewish stereotypes. In reality, however, she was basing goblins off...goblins! Particularly european folklore versions of goblin.
Goblins being short, ugly, pointy-eared creatures is one of the oldest and most classic fantasy tropes out there, and it is not at all a Harry Potter invention. Harry Potter is filled with very straightforward depictions of old fantasy tropes, like giants & trolls (big, dumb, physically powerful brutes), werewolves (men by day, but bigger, hairy, mindless monsters by the full moon) and unicorns (horses with horns that are creatures of light). Goblins fit perfectly in this framework because the classic fantasy goblin is a short, grubby, ugly creature. You will be hard-pressed to find a fantasy goblin that isn't very close to HP's interpretation.
This applies even moreso to the fact that they run the wizarding world's banks: goblins being greedy and money-hungry is yet again not a Harry Potter invention, but rather par for the course? Like, I've never heard people describe Clash of Clans as anti-semetic for having it's goblins focus entirely on stealing gold, and it's because goblins have been characterized as thieves for hundreds of years. Harry Potter's take, instead of making goblins greedy thieves, makes them still connected to money but without being a strictly negative context. I think it's actually clever.
You could argue a lot of old fantasy tropes & ideas are rooted in racist stereotypes and I wouldn't necessarily disagree, however I do not think all applications of said tropes are racist, especially since tropes evolve dramatically overtime. Fantasy in general has evolved as its own thing long enough that continually connecting it to old racist stereotypes feels like beating a dead horse. Most people don't look at goblins or orcs or any other stock fantasy race and think of a racial allegory anymore, they see Goblin as outlined in Tolkien or DnD or any other embedded cultural touchstone in the same way our view of elves and dwarves have taken massive leaps forward into their own distinct identity.
I agree with all of this.
Also, I've brought this up before, but remember when, for like a year and a half, my icon was this:
Remember when I cosplayed as this character at Comic Con and took a selfie with her creator which he posted to twitter?
This is a short, ugly goblin who is known for being greedy and stealing everything that isn't nailed down. Her story is about her desperately trying to turn back into a halfling because goblins are ugly and evil and she hates being one. Also, a tribe of goblins was going to eat her (halfling) son at one point in the narrative.
No one on this website ever came into my inbox like "woah, I can't believe you're a horrible antisemite who supports stories about goblins!" back then. I don't remember Critical Role or Sam Riegel himself getting very much criticism for it either. And that's good. I don't think Sam Riegel deserved criticism for Nott, and I think most of the people who tried to fight the grandson of a Holocaust survivor for telling a story about a funny goblin would walk away looking stupid.
It's just interesting how everyone was okay with this, but suddenly goblins are a threat to Jewish existence when they become a bigger part of the Harry Potter IP. The goblin in that picture fulfilled her goal of turning back into a halfling in February of 2020. It's not like we were in a totally different place then culturally. Both Critical Role and Harry Potter are huge fandoms on tumblr and there is a lot of overlap between them. It just seems very obvious that people are picking and choosing when goblins are a problem and when they aren't.