Androcles wrote:
How could a jerk like Einstein, mathematically unsophisticated, have made
such an
obvious error as:
the speed of light from A to B is c-v,
the speed of light from B to A is c+v,
the time each way is the same?

Good question. He didn't.

Let's see the question again :

"How could a physicist like [whoever], mathematically sophisticated, have made
such an elementary error?"

Any sane people would add "I should have deeply misunderstood something,
probably some elementary issue".

Of course anyone know that "Androcles" is insane.