Analysis of information sources in references of the Wikipedia article "ファシズム" in Japanese language version.
「It might well be claimed that Nazism and Italian fascism were separate species within the same genus, without any implicit assumption that the two species ought to be well-nigh identical. Ernst Nolte has stated that the differences could be easily reconciled by employing a term such as 'radical fascism' for Nazism. ... The establishment of fundamental generic characteristics linking Nazism to movements in other parts of Europe allows further consideration on a comparative basis of the reasons why such movements were able to become a real political danger and gain power in Italy and Germany, whereas in other European countries they remained an unpleasant, but transitory irritant…」