What background radiation?
The one that doesn't produce shadows from the foreground galaxies???? Showing it is actually a local phenomenon?
The one that has both red and blue shift? Showing it is a local phenomenon, since no other radiation from any distant source beyond the local group shows any blue shift.....
people lack the ability to apply logical conclusions. But we do have a fairly recent source of radiation yet to be accounted for, the deceleration of the solar wind at the heliosphere discovered not too long ago. Which would occur in a 360 degree sphere around the sun, produce no galaxy shadowing as it is foreground, not background, and produce both red and blue shift due to the earth's motion around the sun.....
The logical conclusions and recent discovery of the deceleration of the solar wind point towards the so-called background radiation far more strongly. radiation which by all know physics and electromagnetic theory would necessarily be in the microwave bandwidth. No special pleading or fantastic scenarios needed to avoid why it produces no shadowing and has red and blue shift.
The blue shift alone is enough to discount any background radiation from long ago, since not a single solitary known source of radiation at vast distances has any blue shift component whatsoever due to any motion of us or the galaxy..... but i guess we can ignore the actual observations if you all prefer.
And besides applying fantastical neutron stars, when neutrons immediately repel one another, the 100 year old model of nucleosynthesis has been laid in its coffin..... So I am not sure when you people are going to let it die....