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Is there a trope for a joke where someone will praise something (it could be a person or a group) without knowing later/recent events, not realising how horrible they are? I've been looking for tropes for the Todd & Aaron videos Mega64 have made, and there's a gag where either one or both of them will praise something (like, say, Harvey Weinstein or ISIS) and have to be told the horrible things they've done.