Maybe she, or more likely, her secretary, got some kind of missive from him that was a little freaky, so she went to his youtube channel. I do not know why she would subscribe though, but I guess it could be in error while she was seeing what this freak was about?
Didn’t John Lennon sign an autograph for his killer an hour eariler?
He probably contacted her multiple times and she became alarmed.
It’s not possible to accidentally subscribe.You have to go to the the big yellow subscribe button and click it.And you can just as easily unsubscribe.This may very well have set him off he may have gotten paranoid and thought they were after him.Not that I’m saying they did anything wrong, he was nuts eventually something would have set him off.