As you can see a big majority, over three quarters, of banned subreddits had less than ten users, and 99% had less than 5000 subscribers.
It's very possible that the other 82% are distributed over the larger, more popular subreddits which are not encouraging hate speech. As an example, if someone posted antisemitic content on r/dataisbeautiful, that might be counted towards those 82% but that is not a reason to ban the whole subreddit.
https://www.reddit.com/r/redditsecurity/comments/idclo1/unde...
As you can see a big majority, over three quarters, of banned subreddits had less than ten users, and 99% had less than 5000 subscribers.
It's very possible that the other 82% are distributed over the larger, more popular subreddits which are not encouraging hate speech. As an example, if someone posted antisemitic content on r/dataisbeautiful, that might be counted towards those 82% but that is not a reason to ban the whole subreddit.