Also, presumably not everything the KKK does is bad. Is it wrong that people in the KKK are all lumped together?
These are all questions of guilt by association, no?
I have in the past loaded Gab, 8chan, and Facebook in my browser. Am I “linked to” the users of those platforms that have committed mass murder?
Plus that's kind of two degrees removed from the original comment. If someone who does a horrible thing cites a community as a motivation/inspiration, yeah that group should absolutely at least think about what that says about them. It's not an immediate condemnation of guilt, but if there's strong evidence that that community's behaviour or ideology provided motivation, or if there's a repeated pattern, then it's a problem. The alternative is to say there's nothing wrong with white supremacists because all those people who commit racial violence citing white supremacy are just incidentally related, or that there's nothing wrong with gangs because we should avoid "linking" people who commit gang violence to their associates.
There was a lady who used YouTube in April 2018 who went to Google and shot three people. I recently engaged positively with YouTube. I also engaged positively with YouTube in April 2018.
Am I linked to a shooter simply because we used and enjoyed the same content on the same website?