IMO, for far more legitimate reasons than many attempted cancellations I've seen in the past. The guy was the driver behind many initiatives, but on a personal level I'd no longer want to meet him.
There has been some easy to find coverage of all the recent controversies. This video [0] is a decent starting point, but it's really easy to find relevant information by plugging in a few keywords into any search engine.
Overall, he's not a good fit in a leadership position given what others have been seeing. I don't care enough to call for him to be cancelled, but I would support removal from any public speaking position at the FSF. If they can find someone equally hardline on software freedoms but more acceptable in interpersonal interactions, he should go immediately.
> What made you feel this way, exactly?
There wasn't any single thing that threw me off (except maybe personal hygiene habits), but the sum of everything that's going on, crossed my "this is OK" threshold.