I don't think so, and I have several reasons why (Arguably there are soooooo many ways Time Travel could go wrong that I wouldn't even attempt it):
1. If time travel is possible and I decide to kill baby Hitler, then doesn't that already mean I've failed or that I eliminated someone else? (The idea is that if it is possible, then I'd have already done so, which also means that time has already been altered and that I may be killing someone completely different or less evil then who I already killed in the previous timelines of my own travel. Basically it'd create a infinite loop of myself going back in time to kill a different dictator every time).
2. By killing Hitler I may actually kill more people. (During WWII the Soviet Union and Germany fought one another, it was also during that time that Russia had already been spreading it's influence and power across Europe. If WWII hadn't occurred, it could be argued that Soviet Russia could have come to power through the conquest of all of Europe a superpower that would start WWII itself against the United States and any opposing European countries).
3. Technology would be GREATLY hindered, thus I might erase my own time traveling out of existence...which would cancel out my own tampering of the timeline and creating another infinite loop of destroying/re-creating the timeline. (WWII is considered a major factor with technological and medical advancements of the last 100 years. Things like rockets, transport, medicine, all those things moved ahead smoothly thanks to the war. Another factor that boosted our advancement was the Cold War, which may have only happened because of WWII ending. So if I kill Hitler and erase all that technology, then wouldn't that erase my own ability to even time travel? Which would at the same time cancel itself out and erase my own killing of Hitler...so that'd be a infinite loop that results in me constantly entering the machine and killing Hitler for eternity.
4. But all paradox and infinite loops aside, I don't think I could morally kill a infant. Cause even if he technically 'Is' going to start the Holocaust and WWII, as a baby he could be considered innocent of all crimes. (Though MAYBE Hitler was killed by a time traveler...he did die near the end of the war...and some people aren't 100% clear on how he died or what happened to the body...)