Division has a temperature. Affect is the hot face of segregation: not which side a person takes, but how they regard the other one — hostility, its targets, its register. The dissertation bets that private news diets are organized more by hostility than by slant; if that holds, affect rather than ideology is the working structure of the echo chamber. The anti-Americanism work takes the same face cross-nationally: what looks like a single hostile attitude decomposes into distinct dimensions, and the conspiratorial strain is the one that hardens opinion against correction.