I'm sorry, but we don't have to give spaces for people to be hateful - Reddit banning those assholes was the highlight of my week. I'm not trying to claim that these people should just be ignored, but you're conflating very separate problems.
More importantly, the people being affected by the opioid crisis are predominantly not members of these hateful groups, and I'm pretty frustrated you would conflate them in such a way just so you can have an excuse to talk about the loss of a safe space for hateful rhetoric.
*EDIT: After rereading what the poster wrote a few times, I believe they were attempting to claim that the subreddit bans would encourage more people to head to drug use, rather than vice-versa as I originally interpreted it - it's still pretty off-topic though, and again I'm not very sympathetic to people being sad they no longer have a place to be hateful.