“WHAT SHOULD THEY KNOW OF ENGLAND WHO ENGLAND KNOW”
This was said at a time when British Empire was at its height and when most English thought 1 one Englishman was worth 3 Foreigners. The quote basically says the majority of English only knew England not the rest of the World i.e. they were blinkered.
I would suggest we use the following for “WHAT SHOULD THEY KNOW OF JUDO WHO JUDO KNOW”
Judoka blinkered to all other forms of Jacket Wrestling