How to discuss religion with believers?

[Drich]

That's conjecture and uses circular logic.  It doesn't demonstrate dark matter.  It assumes dark matter and uses bullet clusters to try and support that conclusion instead of using bullet clusters to prove dark matter.

If I put out a mousetrap (system), it doesn't prove there is a mouse (object) in the house.  The idea of a mouse doesn't prove the system.  The system proves the mouse by identifying it.  As such we can conclude the mousetrap as an effective system.

And, so, you're saying that unless physicists can weigh electrons on a scale, then, they don't have mass?  Or, their mass cannot be precisely determined?

What already run out of "on parade"  snappy come backs already??

The fact that there is an argument between you and another person only supports my original assertion, in that there is more faith expended in a theory like this than needed to literally make contact with God.