[Colofornian]

Warren does draw absolute lines theologically

If he does, he didn't communicate it well in this article (or he was misquoted).

Even aside from whether or not Mormons, Jews, etc. are welcome in his training sessions, to indicate that he believes the line that divides to be "non-essential" is not a very theologically savvy thing to say (or fail to clarify).

[CyberAnt]

I don't understand. You would hinder another man of a different kind of faith from attending a seminar which might truly enlighten him to the true meaning of the Gospel ..?? Is that what you're saying ..??