PCGamer really hates doing journalism mhm ? You have to figure out which link goes back to the actual article about the mentioned report, and then find which link directly goes to the report : https://www.adl.org/resources/report/steam-powered-hate-top-gaming-site-rife-extremism-antisemitism

The full report actually provides a lot more information and answers some legitimate questions, and other ignorant comments raised in here, there's an entire appendix about their method and how they fine tuned an ai model to review 150+ million profile pictures / 600+ million comments

There's also interesting info about the customization of Steam profile, which I don't remember Steam publicly sharing :

At the time of data collection, Steam Community had 458.32 million users. Of these, 418.4 million were public profiles and 39.68 million were private profiles (even if a profile was private, there was certain related information that was publicly available).

Many of Steam Community’s 458.32 million users have not customized their accounts extensively. Only 7.4% of public profiles have a summary, Steam Community’s equivalent of a social media bio. 41.8% of profiles use Steam community’s default profile picture, making it the most common avatar on Steam, present on 191.2 million profiles.

Most Steam Community users are also not particularly active. One proxy for activity is player level, which users can increase by activities such as buying games or collecting trading cards while playing games on Steam. Among the 91.69% of Steam Community users who publicize their level, the average level is 2.8 and the median level is 0.0 (the maximum level observed was 5,001). Our detections should be interpreted with this context in mind.