The cause of God is like the cause of purple. Some people receive the exact same stimuli that cause some to experience God without they themselves experiencing God. In this sense we could speak of those who are "God blind" within the same legitimate scientific framework we might speak of someone being color blind.
Except people who aren't color blind can all agree on what "purple" is and what it isn't.
The religious obviously can not. Not even within the same religion. Not even within the same denomination of the same religion.
Also, we understand the concept of "color". We KNOW what it is that makes us see "purple". To the point of being able to "blindly" set up things of which we can
predict accurately that people will perceive it as "purple".
Nothing even remotely similar can be done with gods.
This fits with the hypothesis that gods aren't backed by anything
real, while things like perceived colors ARE backed by things that are actually
real.
To the point even of being able to accommodate for the color blind.
Case in point, I have a software company. We build and distribute a retail software product to manage inventory, accounting etc. We make use of styling to reflect validation errors. We do this with colors. We also have an optional setting that changes these validation styles from colors to icons. We do this, because we
know that the color blind won't be able to see the validation styles if only colors are used.
So our model of what colors are, and how perception thereof actually works, has
explanatory power and
predictability.
Your god model has NOTHING of the sort.
So no, it most definitely is not a proper analogy. It might sound nice at first glance, but clearly this wasn't well thought through.