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Using “あなた is already a huge red flag. Using it once gives the reader context on whom the speaker is talking too. He also could’ve used “国粋主義” for nationalism.
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Yup, excessive subject words are probably the most amateurish mistake any beginner can make. Also the last part "辞任する" is a classic Google TL fuckup. He's trying to demand Kishida to "Resign!" but the "する" makes it sound like he's saying "I will resign!"