I singled that group in the 1930’s out because Paul’s and Buchannan’s positions come from these isolationists. There seems to be nothing entirely new in the “something new and different” of the Paulists. Just as the OWS recycle the 60’s radicals who recycled the 30’s communists who, in turn, “discovered” the IWW and Bolsheviks.
Also, the 30’s isolationists favored the rise of the fascists in Europe. So, isolationism was often more, “don’t get in the way” than “don’t influence”.
Buchanan, like many Irish Catholics (including Joe P. Kennedy), had a hatred for all things British, They would have loved seeing the swastika flying over Buckingham Palace.