It's supposed to be so obvious to everyone that JWs have the Truth... because... well they just do, and everyone knows it. So when someone who has just been woken up at 9:00 on a Sunday morning says "not interested," they are willfully rejecting God and opposing his organization. Who could possibly stand in the face of such opposition, nay, persecution? Only God's Spirit-Directed Organization, surely. </sarcasm>
(I also find it interesting that they can say Jehovah is the final judge - after making such strong judgments about people's motives themselves.)