Fantastic Beasts Theory: Grindelwald Caused World War Two

So, what do you think? Is it possible that Gellert Grindelwald caused World War Two as a means of overturning the Statue of Secrecy FOR THE GREATER GOOD? If not, what do you think is going to happen in the upcoming Fantastic Beasts And Where To Find Them sequels?\r
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And even though its years and years away now, who else is so excited for the Legen-wait-for-it-Dary duel between Grindelwald and Dumbledore! It better be as good as the duel between Dumbledore and Voldemort at the end of the Order of the Phoenix!\r
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I dont know if his name is pronounced Grindelwald or Grindelvald, Im sorry to any German speakers out there if I pronouced it wrong!\r
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Pottermore: \r
(this was the source for a large majority of my information and fs I used to back up my points)\r
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