What's fair is fair.

The issue about non-believers came to surface when in the eraly 90s, there had been an attempt to start a dialogue between Christians and Muslims. At that time somebody raised this issue (how would the some Churches have a dialogue with non-believers?), or it could be the opposite (why to have dialogue with Chruches that consider us Muslims as non believers).

Then there has been sort of compromise or "political" solution and the dialogue commenced.