After reading the linked article my first thoughts were along the lines of "these words sound great, but something is wrong here".
 
I re-read it - then it hit me (am slow at times) - this person is  blinded - one doesn't preach the gospel until one KNOWS the gospel. This one doesn't.
 
Advice - READ the book, read what we are told to do. Bro Paul (and others) made it clear -
 
Come out, leave, do not associate, break off - you are involved with a system that is teaching a false Christ and a false gospel.
 
Get out.