Here is the money quote from a review of Ephraim Radner's new book, Brutal Unity.
He doesn’t want to delete “heresy” from Christian discourse.
As I understand him, he follows very strictly Jesus’ instructions
concerning discipline. Sinners and false teachers who refuse to listen
to the Church become “Gentiles and tax collectors.” But then Radner
wants us to remember that Jesus lived among tax gatherers and sinners,
and he calls his disciples to follow. Correct the false teacher, but
then pursue him so that he can be restored to brotherhood. What the
Church cannot do, if she is following Jesus, is set heretics out and
then rest content with the unity that remains.
If this quote pique's your interest, you can find the rest of the review here: