I can answer that question quite easily: God gives each of us the gift of free will to freely choose for ourselves how to order our lives. That is the greatest gift there is next to the gift of life, the greatest gift of all. A plurality of Germans used their God-given free will and freely chose Adolf Hitler to be their Führer just as the Electoral College chose Donald Trump based on the freely cast votes of millions of Americans.

Where was God when Hitler slaughtered seven million people? Undoubtably weeping in heaven.