Would you kill Baby Hitler? Or use time travel to your own personal advantage? Or something else?
Its possible that killing baby Hitler would accomplish nothing. Someone else might have taken his place doing the same thing. Its possible that the environment in Germany produced the result rather than the man.
Just look how shocked the ultra left is at a Donald Trump presidency. It was the environment that did most of the work to put him there. Its silly to think he did it on merit.
You can do something both racist and nice at the same time if you had a time machine. What would it be?
To go back and prevent the US slave trade. If you did that none of the African Americans would exist. But it would be a compassionate act but also racist.