Having said all of this, I still believe it would have been best for Piper not to invite Warren. In inviting Warren, Piper is implicitly downplaying the reasons that many Reformed Christians have expressed concern about Warren and his ministry and have separated themselves from both. Yet these are good reasons based around sound biblical concerns. Let me look at this under two headings.
Read the rest of the post here and let me know what you think about Piper inviting Warren.