It won't come as a surprise that a bunch of ill-informed Facebook posters jumped to an incorrect conclusion and started a baseless conspiracy theory. Such things are a regular occurrence. But it is notable that in this case it involved a contestant on the US TV show Jeopardy.
It's pattern social media behaviour. Someone posts a wild and completely incorrect opinion, a bunch of other someones stupidly decide to believe something posted on social media, then they're joined by the usual host of virtue signallers trying to increase their standing in the peer group. Before you know it you have a conspiracy theory on your hands, and a Jeopardy contestant is castigated for no reason.
To make matters worse, an organisation representing the people who were supposed to be offended by this said the contestant had done nothing wrong but, in true social media style, much of the baying mob refuse to believe the contrary evidence.
I sometimes wonder if computers should be licensed.