Owning/reading Mein Kampf alone shouldn’t be an indicator of anything. It has huge historical significance and is useful in understanding how the Nazis rose to power, and recognize the beats of Mein Kampf being repeated today. Obviously not everyone who reads it/reads a summery of it is a Nazi nor becomes enthralled by its message.
If one has that book and also says things like, “Hitler had some good ideas.” it may then be an indicator of bad things.
