With whom else did Sensei err?

Did Sensei err in appointing Mr. Williams and the General Director of Singapore?

"There were also feedbacks on Ex-General Director doing things in his own way instead of following SGI guidelines and bringing members close to the mentor."

With whom else did Sensei err, Danny Nagashima, Mr. Samuels, Mr. Kaneda, Mr. Asomani, Mr. Alcantara...?