I don’t know why I’m doing this, but to be fair he was talking about FO personnel. I wouldn’t raise this point if he had said this about the Resistance or characters in general. The Empire that we see and get to know within the OT films comprises white men, a rather Nazi-esque group in their overall style.

The FO seems to have… progressed to a much more diverse, multiethnic and gender group. I guess anyone has a chance to be evil!

In the EU, new and old, efforts have been made to make the Empire (and to be fair the rebels too somewhat, especially pre-ROTJ, seen prominently in Rogue One as compared to ANH) more diverse, so that in universe when taking all media into account it’s pretty uniform throughout. As opposed to, say, seeing an office with all men working at desks and all female secretarial staff and using that to help you determine when it was filmed and/or set. Norms of society shift over time.

Now… I’m not defending what I perceive his point to be per se, but I kind of like the OT Empire being pretty well monolithic and implicitly racist, mostly out of a desire to rationalize the lore of the movies without cheating by talking about other things off camera that change things, but the FO is a different beast forged in a different generation and having different needs in order to amass power.

JEDIT: To be extra clear, my value criterion here is verisimilitude of the movies as they are, extrapolating from them rather than pushing other things onto them. The same way some of us may have thought up in-universe explanations for filmmaking issues like the ‘force field’ under the landspeeder or a convoluted reason for 3PO to waver on recognizing Leia in ANH.