"Wizardry" surrounded by "cult", "no highly visible projects" and "shortcomings", followed by unbacked focus on a particular national group reads more like "quackery" to me.
I get that meaning might be lost in translation, but also think that it's fair to assume the worst, esp. on an Internet forum.
Wizardry and magic has positive vibes in American culture. I can see how that might not be the case in others.