I guess we should remember that this Mexico/Malawi stuff really got going under Knorr/Franz pre-Governing Body...but of course the GB even until now has done NOTHING to redress the issue.
Franz hints in the book that the real difference here was that the Malawians were dirt poor, but the society had quite a bit of property in Mexico and did not want to risk it. I believe that.
Let us not forget also that this was a dual standard between Mexican witness young men of draft age and U.S. witness young men of draft age - with many U.S. witnesses going to jail over the draft as they could not even claim conscientous objector status according to the society of the day. That of course was later changed, and of course it was blamed back on the jailed witnesses as being all of their own free judgement.
RIGHT. Just like blood transfusions.