Ok. Let's see how well you understand math.

Do you understand the Doppler effect?

That as a source of waves, be it light, or sound, moves relative to the reciever, the effect will be to shift the spectrum up, if approaching and down, if receding.

Are we in agreement so far, Yes, or no?

Presumably we are in agreement that this is movement in an otherwise stable metric of space. If the train is moving away, it doesn't stretch the tracks? Yes, or no?

If so, what changes is distance. Yes, or no?

To put this in mathematical terms, would it be useful to describe the space as the denominator and the distance the numerator? The units it is denominated in relative to the number of those units. Yes, or no.

Now with cosmic expansion, it was assumed to be a normal doppler effect in otherwise stable space, but when it was realized that redshift increases proportional to distance in all directions, making us appear to be at the center of the expansion, it was changed to an expansion of space itself, because spacetime!

Even though this would mean the speed of intergalactic light isn't constant to intergalactic space. More lightyears, not stretched lightyears.

So it would seem this expansion is denominated in terms of the speed of light, in order to redshift. Making lightspeed equivalent to the train tracks. Are you still in agreement? Yes, or no?

Yet wouldn't that make the speed of light the denominator and thus the determining metric of space. As Einstein said, 'space is what you meaure with a ruler" and the ruler in this case remains the speed of light.

I think it is safe to say, your response by this point is, No no no no!!!!!

Yet can you logically explain at what point I'm making a mistake?

It is a fact that multispectrum light "packets" do redshift over distance, as the higher frequencies dissipate faster, but that would mean we are sampling a wave front, not observing individual photons and that raises other questions, but I sure you have resigned yourself to me being another idiot who understands nothing.

Fortunately the stones cast by this cult are only verbal.

I'm waiting on the James Webb, to see if the background radiation is evidence of some primordial event, or simply the light of ever further sources, shifted off the visible spectrum.