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No. Not even if you said stop WWI and WWII and all those deaths.
I would never commit evil simply to try to change the future. (it would be trying to change the future according to your hypo)
This sort of argument we all did in college after Jack Black and a quarter pound of weed. It is meaningless. It is like the first grader who was asking questions after his school practiced a "code red lock down drill"; he asked what would happen if the school was taken a mile in the air by a tornado. The teacher told him in that case he should pray, because everyone would be going to school heaven real quick.