So, a decade after the horrors of WWII, Walt's bona fides are washed clean via donations?
Art Babbitt, cited as an authority in the Wiki you cut and paste, is the source of the claim about Walt's frequent attendance at the German American Bund.
He was the only figure in Hollywood to welcome Nazi propagandist filmmaker Leni Riefenstahl in late 1938, *after* Kristallnacht.
He was virulently anti-union, anti-communist (appearing at the McCarthy hearings as a friendly witness, making accusations against others in Hollywood), and his vision for EPCOT has more than a bit of corporations-as-government vibe.
Whether or not he personally felt or expressed racial/religious animus against Jewish people is neither here nor there when it comes to his sympathies for fascism. Fascism comes in more than one form: the current US version involves active support for Israel's genocidal violence in Gaza, for instance. So gaining an award from a pro-Zionist organisation is no proof of non-fascism. (Indeed, the current Israeli government includes members who are *self-described* fascists).