Hamas (It’s the real name, not name-calling or a pet name) alleged atrocities (nothing inflammatory only alleged) on October 7 (the official date)

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It is my opinion that it’s all false. (first sentence) There is no proof. (second sentence). There is no exhibit. (third sentence). There is no credibility. (fourth sentence). But can it be true? )fifth sentence. Here is what one view on the subject is - I'm not sure if it should be a colon or a semi-colon.