The question of, "Would you abort/kill baby Hitler," has been in the news lately, both as a survey question and one posed to Dr. Ben Carson.
In the former case, it was a question about the morality of killing someone who goes on to kill many people.
30% is a lot of conflicted people, with possible more leaning that way.
The question as it was posed to Dr. Carson, known anti-abortion believer that he is, was clearly designed to either make him give a hypocritical answer, or appear to "support baby Hitler".
This reminds me of the "have you stopped beating your wife" question. It's designed to make the answerer look bad either way.
On the whole, I find this a pretty interesting question. It is assumed in the question, at face value, that if you kill Hitler before he kills other those lives would be saved.
It also assumes the idea of "knowing what we know now". This is tricky to me because all we know now is that Hitler rose to power, lots of people died, Hitler made some mistakes, Nazis ended up losing WWII.
If you simply remove Hitler from the equation, there is nothing that says a worse, more cunning dictator wouldn't have taken his place. Perhaps this new dictator doesn't make the same mistakes and the Nazis actually win WWII. Would it have been good to have killed Hitler in this case? Of course not!
I'm sure somewhere like the History forum has had a lot of discussion about alternate realities where Hitler wins or is displaced by a more powerful dictator or whatever else. But given the question has been posed more lately in the media, it may make for a good discussion in this forum.