Re: "used only in extreme terrorism cases"
While I might agree with you in spirit, I need to mention that famous Monty Python scene ref. your claim about "extermination of all bar "the Master Race" (which included Germans, Scandanvians, Scots, English, Irish and Dutch) - EVERYONE else was included in "the Final Solution".
I would like to point out that you failed to mention the Finns, (some) Chechs, and quite a lot of other European nations, who might have enjoyed the master race status if the III Reich had its way in the end. Also, surprisingly, a huge majority of Poles (minus the intelligentsia, to decapitate potential resistance) were not destined to the gas chambers, or other forms of extermination, "merely" to server as semi-intelligent labour in the east. Sort of modern Roman Empire style with its outposts, masters, slaves and savage tribes with 20th century extras on top.
And I don't mention the issue in the "what good did the German Master Race" bring to us"? spirt, but to veto "EVERYONE else" bit, because I find this SCREAMED generalization quite misleading. So, to quote your own words again, "Maybe you should read a history book or two".
p.s. I'm "one of those" (Nazis), and the proof is in my Bayern ancestry
p.p.s. I might carry some merit though, and the proof is my upbringing, a few miles nw of Kiev.
(not a swipe, just food for thought)