Evil is unintelligible. It is just a thing in itself, like boarding a crowded commuter train wearing only a giant boa constrictor. There is no context which would make it explicable.
The biggest trade that Germany and Britain had was with each other, in the prewar period; I think I'm right in that. Two highly industrialized nations had the most trade with each other, and it wasn't tariff policies alone that made trade relations better for both of them.

