you're the leader of an invading alien civilisation

choose the one reason why humanity either lives or dies

and be more original than 'trump'
we get it, you watch snl

The stupid humans must be annihilated because they kill deer

I'll wipe out the humans because earth could make good storage space for my civilization.

I would let them live, because they are quite entertaining to watch. However, if they tried to reach out into space before they get their muk together, sorry, not happening. I still wouldn't destroy them, but somehow trap their civilization until they learned to behave like a proper species. Hell, I would setup my species on a neighboring planet and let the Earthlings see a proper example of how society on a planet is suppose to run. Oh yes. >:3

Keep the earth because seafood pasta is a thing.

Let us live.
Shitposting is flourishing. Memes are aplenty. People from New Zealand are called Kiwis. What a time to be alive.