Great, this is pre-Godwinned.
Fascists always make for dramatic architecture. Not always pretty, but imposing.
If it survives the wars they start, that is. For me, the issue is a non-starter. There is no such thing as "evil" architecture. You could build an exact replica of Speer's Reichstag building and then run the most benevolent democracy in the world from it (assuming you could find enough workspace inside-that building was not efficient in any sense). Bricks and mortar do not have the power to warp souls.
Personally I like grand architecture, no matter the peccadilloes of the builder. Is anything more stimulating that Rome, or the Acropolis at Athens?