He strongly criticized Hitler, who he called a clown and who's policies he called barbaric. His main critique of the Jews was their cultural influence: "Aryans ought not to leave their guidance and interpretation to persons of an irreconcilable Semitic culture,...If the Jews had a nation of their own (and they would if they had our guts and self-respect) I’d be the first to insist that it be kept free of Aryan influences. As it is, I honestly regret the Aryan taint (any infusion is a taint if it’s where it doesn’t belong) in the noble and ancient culture of Japan."
(Quote from here: https://chuckhoffman.blogspot.in/2016/03/making-excuses-for-... )
Even today many folks hold similar views: think of SF nimbys and other left wing activists who are critical of the cultural influences of tech bros and gentrifiers.
He also thought blacks were fundamentally inferior; are you going to characterize this as somehow uncommon in the 1890-1937 era?