Considering how long this thread has been open, this may not be the correct place for this but I wanted to bring awareness to the situation.
I genuinely appreciate how open and inclusive The Sims 4 is, and the incredible creativity shown in the gallery. I obviously don't want that to change.
I'm honestly not sure how EA/Maxis handles complaints about gallery content, but it appears that you have some banned words and the option to report content, but that reporting content does little if anything. In other words, I'm reasonably certain that you don't have human moderators looking for offensive content, although I would hope that a human being looked at items that were flagged.
That said... I would suggest that you get one of your Jewish employees to search the term "Jewish" in the gallery and sort by number of downloads. Depressingly, there's an antisemitic stereotype couple with over 1200 downloads and comments like "lmao sieg heil." This is, shall we say, not welcoming to Jewish Simmers who would like to represent themselves in the game. This item has apparently been in the gallery for many years and many people commented to say that they were reporting it, and yet it remains.
If you don't understand why the item in question is an antisemitic stereotype, here's a link. TL;DR: The rich greedy Jew is a stereotype rising out of historical antisemitic oppression in which Jews were denied entry into most professions, but were allowed to lend money because money lending was a sin in Christianity (usury has since been redefined from "lending money with an interest rate at all" to mean "charging excessive interest") and therefore banking was a profession forbidden to Christians. This stereotype is harmful because it encourages hatred and dehumanizes Jews into malevolent stereotypes.
Let's assume that you don't want to "squash the creativity" of the creator, and that's why the item has been in the gallery for years. Can you at least consider removing the item because it's a magnet for offensive comments and hate speech?
Thank you very much for reading this far, and please consider evaluating whether or not your gallery flagging system is effective.