"Maybe this person is ok? Maybe I'm overreacting. They might be generally sensible, just not sensitive to all the issues, not so informed or so willing to make an effort, a bit behind the curve."
*checks profile*
"Yeah, no, ok, I do not need to see anything more from this person ever. Life is too short."
I always give people the benefit of the doubt, occasionally it's worth it and may broaden my horizon. But usually the comment I catch in a thread is less outlier, more tip of the iceberg.