I don't get Vance...he's married to a not-white person...but supports this stuff
Are you certain that you don't "get" him?
I find it easy to explain. Think Taliban where Women are property. In Vance's mind, he owns a nice piece of meat. Full stop.
The distinction is that she's not "human". And without agency, in his view, then there's no danger or threat from her race.
Republicans are happy to have slaves of any color. So long as they "know their place".
Perhaps the confusion is in calling them Nazis. They are not the German Nazis of the 1940s. While the parallels of fascism and racism are vast, they still each have their own flavors and styles. MAGA is happier with enslavement than with pure eradication.