I guess I should clarify that I don't find what he says offensive or bad enough to warrant newspaper articles pointing them out years later, but I'm not surprised someone is offended or that some would take offense.
But at the same time nothing he said is bad enough that it should keep him from being on jeopardy or guest hosting. Just because some people are offended doesn't necessarily mean people should be banished forever. No one is being denied a right to their feelings or reactions. But that alone cannot control the whole decision, at least in this case.
Ken jennings has been a public figure for 20 years, or close to it. Yes he could stay off social media but short if that, if you are in the public eye long enough, there are probably going to be a few things you say people are offended by.