I guess World War 2 was justified because a handful of Jews signed the 1918 armistice (sarcasm). Do atheists really believe a genocide was justified just because 6 million people happened to believe in Yahweh?
I would be quite surprised to find an atheist who would use the word "justified" in direct connection with genocide-- or even attempted genocide for that matter.
But I've been surprised before.
No-- I would think that an anti-semite, non-theist might use the word "deserved", but not "justified".
Me? I'm against any and all forms of genocide, regardless of who the target victims may be.
I'm even against killing all the NAZIS. I do not think it is possible to justify mass-death the way the NAZIs did under the holocaust.
Hell--- I have serious problems with the mass deaths during wars...! I understand why they happened, and I lament that they did take place-- but I have a problem trying to **justify** any of them!
The word "Justify" carries some moral weight in my mind, you see.
(and no-- I do not have a pat or ready answer to the question: "is any death ever justified".... it's an issue I am still wrestling with. )
(( and in case anyone misunderstands, I don't think the Jews *deserved** what happened to them in WW2, either..... nobody deserves such a fate as they collectively suffered. ))