This summary is not the rule. The rule text controls.
Here's a plain English summary of this rule:
A witness's religious beliefs can't be used in court to make them look more or less trustworthy. Lawyers can't bring up what a witness believes about religion to argue the witness is honest, dishonest, or otherwise credible.
This means the judge and jury are supposed to judge a witness based on their testimony and other proper evidence, not on their faith or lack of faith. It doesn't matter if the witness is religious, not religious, or belongs to a specific church or group. That information stays out of the case when it comes to deciding if the witness is telling the truth.
The point of this rule is to keep personal beliefs about religion separate from the facts of the case. Courts want people to be judged on what they saw, did, or said, not on their private religious views.
