Jim,
I'm trying to understand from the same evidence (partly at least) how such apparently diverse conclusions can be drawn. How evidence is assimilated is central. I've made no personal remarks, but I'm sure you agree that 'how' science is done varies to great effect.
I think I now understand better. The quotes you give can mislead, for a very good reason. They discuss what HAS been directly detected, i.e. the high energy particles. Any assumption from that that only high energy particles exist is wholly wrong, as we know locally. That is the assumption you seem to have made, which doesn't account for the vast majority COLD 'dark matter' which is what CDM stands for! (and I deduce from a high weight of evidence; 'baryonic').
If you have any doubts you only have to consider a 'cloud chambers'. We cannot 'see' em wave energy passing through it. Even a good vacuum includes high ion densities, and we can't 'see' any lateral scattering from that because plasma is self focussing. We thus only see the a light pulse passed through it unaltered at the far end. If however there is molecular gas, from H+ He+O+ upwards, we find it is scattered laterally, i.e. we can SEE the EVIDENCE of the pulse having charged the particles, so they then 'glow.' i.e. if there is not substantial em energy charging the particles, as there mostly is not in space, then we cannot SEE the gas particles at 100lyr and more than we can at 100mm.
The free electrons and protons cannot of course be seen via secondary scattering AT ALL because plasma does NOT DO 'secondary' scattering. (All well known and in my essay).
I'm sorry it took me a little time to track down the assumption causing the diversity. I think that does now comprehensively and irrefutably explain why Baryonic CDM or even WHIM Halo's don't; "emit EM radiation detectable by current astronomical equipment?" (Gaia is only 'optical' but will be 400,000 times more sensitive than eyesight -vastly better than current instruments).
There's no doubt it's there. The only thing we're guessing about is precisely how much. Going on local shock densities it could easily be more than adequate for the gravitational effects (including 'curved space-time') but as you say, it also may not.
I really hope that now put's this to bed and you better understanding the physics I invoke, and reasoning behind my postulates.
Best wishes
Peter