Do you mean Ueshiba operated under a honji suijaku paradigm or should I understand "true buddhist/shinto viewpoint" as something different?
I mean he operated from an enlightened viewpoint which he said was the true purpose of all religions. So you could say I am saying a true religious viewpoint, universal, more kannagara.
I mention buddhism and shinto from a cultural perspective and the fact he studied both.
I mention true to mean enlightened.