The thing about Nazis (and other flavors of racist shitbags if anyone wants to play the “well akshually they’re not Nazis, theyre…” game) is they don’t care, they’ll pretend to be reasonable, break bread with their enemies, etc. as long as it’s convenient for them. But they don’t view those others as being equal human beings, so once they’ve accomplished whatever they set out to do, they’ll turn on them as soon as they think they have the upper hand without a moment’s hesitation.

That’s the Nazi playbook and always has been. You can see it happen in WWII, you can see it in the lunatic fringe taking over the Republican party over the last century or so, it’s how these types operate.

They’ll happily throw their lot in with whoever is convenient to their cause in the moment, why should they care? They’re just planning on turning on them down the road anyway, hell, it probably even gets them a better look at how these temporary allies/future targets for extermination operate and gets them in closer for when they eventually make their move against them.