We discuss parachurch organisations from time to time on PB. I would like to recommend the following article from Carl Trueman as a clear statement of the problems which such organisations raise in relation to the church:
Issue 66 Article 2 - Parachurch Groups and the Issues of Influence and Accountability - Affinity
Especially note the following:
The Problem of Influence, Transparency and Accountability in Parachurch Groups
Parachurch Organisations are not the Solution to the Problem that is Represented by Denominations
The Parachurch is Limited by the Fact it Can Never Practically be the Church
Parachurch Organisations Can Be Vulnerable to Cults of Personality
Parachurch Groups Can Give Power and Influence to Those Who Do Not Biblically Qualify for Such
Parachurch Groups Tend to Minimal Doctrinal Commitments and Occasional Eccentric Emphases
Issue 66 Article 2 - Parachurch Groups and the Issues of Influence and Accountability - Affinity
Especially note the following:
The Problem of Influence, Transparency and Accountability in Parachurch Groups
Parachurch Organisations are not the Solution to the Problem that is Represented by Denominations
The Parachurch is Limited by the Fact it Can Never Practically be the Church
Parachurch Organisations Can Be Vulnerable to Cults of Personality
Parachurch Groups Can Give Power and Influence to Those Who Do Not Biblically Qualify for Such
Parachurch Groups Tend to Minimal Doctrinal Commitments and Occasional Eccentric Emphases