What about Clayton J. Woodworth? He seems to have had a deep fascination with "Negroes."
I have a hunch the blood transfusion ban was born out of his fear of Whites being tainted with "Negro" blood.
The men who clustered around Rutherford were odd ducks, weren't they? I wonder if they were that different from mainstream white men at the time?
The turn of the century brought such changes to society there must have been a lot of disaffected good old boys angry about uppity women and blacks who crawled out of the woodwork to make their views known through channels such as the Watchtower provided.
Those older books and magazines are quite fascinating in a train wreck sort of way, psychologically.