Sklansky has it backwards

[m1illion]

If non believers are are wrong, it's their own fault. They weighed the evidence/arguments and made a decision.

If the believers are wrong then they have been lied to. What's more everything that they counted on as their security blanket is gone. Especially missing will be the meaning of their lives.
The believers will feel (rightfully) betrayed.

Emotionally, the believers are likelier to be shattered.