Nazis without human racism and such, it's an interesting idea for sure.
If faced with Alien threats would we become some sort of Nazi society where the idea is to live to fight.
I wonder what kind of soldier I would have been if I had chosen that lifestyle, I just think killing other humans is bad karma and counterproductive. But the arachnids? I am a Trekkie so I hope that we could live in peace, but if faced with a ruthless enemy bent on our destruction I think I would choose to fight.
Even if they are Nazis, it's a nice idea that all of humanity could unite and put differences aside.
Though a democratic uniting would be ideal of course.