Apparently, the Insider Movement is a loose coalition of some who are involved in Christian outreach to Muslims. Those within the Insider Movement claim that since Muslims are offended by language that proclaims God as Father and Jesus as the Son, efforts to reach them ought to eliminate that familial language.
In response to the Insider Movement the Reverend Scott Seaton of Emmanuel Presbyterian Church (PCA) in Arlington, VA has introduced "Overture 9." Overture 9 calls for PCA presbyteries to pull funding from any missionaries or missions agencies which alter the familial language found within the Scriptures.
You can read Overture 9 HERE.