As old G K Chesterton put it, truth is not established by the clock or the calendar. In its heyday, Nazi Germany was the slickest, most scientific, most progressive, most sophisticated nation on earth. You share with the Nazis the view that certain human beings are disposable. Even if the majority of your contemporaries agree with you, you are wrong. Hitler won office through fair elections.
Some principles, like the sanctity of life, are not negotiable. Our holocaust has already claimed at least 4 times as many innocent victims as Hitler's.
But, the slaughter of innocents appears to be perfectly acceptable to you, if the majority approves. I think the Bible calls that condition "a seared conscience." Or, as CS Lewis put it in The Magician's Nephew, if you try hard enough to make yourself stupider than you really are, all too often you will succeed.