Islamofascist isn't a term for National Socialists, it's a term for Jihadists.

Sayid Qtub's writings actually kind of do show a sense of Fascism in "Social Justice In Islam". But, it's not because he's a dedicated Fascist. It's because a Jihadist state literally does make the state God and the epicenter of all moral thought. Both are even rejecting materialist frameworks. The Fascists and Jihadists just ended up at the same conclusion, but the former had to invent a metaphysical concept of a nation, where the latter simply re-asserted Muslims as a nation.