Again, the Big Bang Theory isn’t really relevant to my article or to Pythagorean Illuminism.
But I still don’t see the force of your objection. Redshift has to do with the space between light waves, not with the speed of light. So because the speed of light is constant, redshift indicates that the objects producing the light are moving away from the observer, and this must be at an ever-increasing rate in the case of other galaxies, since the farthest galaxies are measured as having a greater redshift. If the universe is expanding, the inference is that the universe must have been closer together in the past. The evidence of an expanding universe went against the steady state model.
Your objection was that, “The presumed expansion is measured by the redshift of the very same intergalactic light, so it is complete nonsense to say it is evidence of an expanding dimension of space, if the very metric creating this effect is otherwise stable.”
How is it nonsense to measure difference by using a constant metric? How else could differences be determined? If everything were chaotic, there would be no order to take as standard or to distinguish from the disorder. Indeed, metrics are constant by definition.
You then meant to offer an alternative explanation of the redshift in terms of some observer-based illusion. But the standard physicists understand that the redshift is relative to the observer. The redness of the light is due to the human perception of the longer wavelengths, but the physical cause of that perception is real, not illusory, according to quantum mechanics.
What, then, is your alternative explanation of the physical cause of redshift? And how do you account for cosmological redshift or for the evidence that supports Hubble’s law? The expansion of space is supposed to cause objects to become separated without changing their positions in space. The distant light sources “show redshift corresponding to the rate of increase in their distance from Earth,” which means “galaxies are moving away from the Earth at speeds proportional to their distance,” which is Hubble’s law.