Hear me out:
He spares Gellert Grindelwald and lifts the Anti-Disapparition Jinx so he can be free, after asking him about the Elder Wand's whereabouts, as Grindelwald does give in and tell him where it is unlike the book.
Not killing him can be chalked up to not being worth Voldemort's time; the Ax Crazy murderous sociopath, which is already a stretch.
Lifting the Anti-Disapparition Jinx? That's a 'Pet the Dog' moment with no pragmatic reason.
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Why isn't Voldemort not in the Enigmatic category?
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