Liquid Death just paid for a national ad campaign built on the premise that America hates AI data centers. The polling says it was the safest bet in advertising. Last September, Americans were evenly split on having a data center near them. 43% in favor, 42% against. Then opinion flipped at a speed pollsters rarely capture. Emerson measured opposition at 42% in December. By July it hit 63%. Gallup's spring survey found 7 in 10 opposed, with nearly half strongly opposed. Majorities of…