I'd like to start off by noting that Fascism does not automatically equal racism, are their Fascist groups that are racist, yes, yes their are, but Racism is'nt a defining aspect of Fascism overall.
Anyways, I'd say the best way to do this would to go back a little earlier to the early 20's when Fascism was more in what might be called its formative stages. Rather than having Fascism being based the supreme authority of a nation have it be more Technocratic (as in the movement, not system) in that it seeks to create a single, unified global system, now what would be interesting with this is how Fascism might change, OTL Fascism supports the state being the ultimate authority and holder of power, however if you change it slightly you could have it as the state being the ultimate decider and essentially you'd end up with a more Socialistic (rather than Corporatist) Fascism that may (or not) focus more on people rather than the state.