Well, this is a new, modern fascist regime, or rather wannabe-regime. It makes sense that they’be be a mixed bag, unlike the old Empire, since these a more of an ideological off-shoot of the old Empire. The Empire was Palpatine’s New Order, these are fascist rebelling against the New Republic, modelling themselves after the Empire. Also, it’s been 30 years, so it’s hard to tell what their view of the old Empire actually is.
Until the EU, or the new films explain these details we can only make guesses. Also, it’s not like fascism is immediately based on racism. The OT Empire was kind of mirroring the Nazi’s, as well as British colonialism, because that was still somewhat relevant back in the 70’s. This is 30 years later, both in the real world and in the SW universe, and a lot have clearly changed in both during those three decades.