The referral to JWs as "These idiots..." is parallel to the way the governing body sees people who are not JWs or who have a different opinion.
For example, the January 2018 study WT says the following re non-JWs....
"... many of us live and work with those who are infected with attitudes and characteristics that run counter to godly qualities. .... We will also see how we can protect ourselves from being infected."
This is egregious language on the part of the governing body and its writing committee. They really do look down on others who are not JWs. So does "Big B" similarly look down on others in describing those JWs as "these idiots". Reminds me of the third reich's use of the term "untermenschen". Good injection of respect for others is needed!