It’s really hard when trusted people change dramatically. For the sake of our faith, often we don’t really want to know why they changed. It might require us to change too.
The point of the gospel is not to get the work done. The point is accurately represent the Father. Jesus’ charge in Matt 28:19-20 wasn’t colonial; it was to be ambassadors in the fullest sense of the word – to personally BE an extension of the Kingdom and to fully embody Jesus to those around us. That looks a lot different than many approaches to the gospel.