I like how Kyouko completely overlooks the fact that they are a highly advanced race capable of traveling across the universe and are, in fact, responsible for our current state of technological progress. They likely have weapons that would completely obliterate us if it ever came to a conflict of force.
That said, simply exposing his scheme to the whole world should suffice to stop him. Only girls living in third-world nations where access to global news is scarce would be in danger, and it's a simple matter of helping those governments spread awareness in those areas. From there, they just need to get rid of any remaining Witches/Familiars, and have some sort of plan in place for when the remaining Magical Girls become Witches themselves.
Man, I am such a nerd, seriously analyzing this in what is clearly a comedic strip...
>"Such methods are simply too cruel." I'M SORRY, WHO WAS THE ONE THAT COMMITTED INCUBATOR GENOCIDE AFTER BECOMING THE GODDAMN DEVIL????
Wait, that's a thing?!
I disapprove.
and with the combined power of all mankind,
we'll annihilate them all!!I see... A strategy like that just might work.Right?Perhaps, but we humans have a hard enough time exterminating rats or cockroaches. Will it really be that simple?Whether or not that strategy would work, such methods are simply too cruel.Magical girls are supposed to be heroes, are they not?Okay then, how would you do it?...and make contracts with little Incubator girls.Are you interested in becoming a magical girl mascot character? You'll never find a contract with terms this favorable!First, we travel to Kyubey's home planet...In my opinion, we should say, "an eye for an eye, a tooth for a tooth," and deceive them just as they did us.Hey, you there!What?Homura Productions