To many, the death sentence almost feels like a blot on the city’s collective consciousness. To the amazement of people elsewhere, Bostonians overwhelmingly opposed condemning the bomber, Dzhokhar Tsarnaev, to death. The most recent poll, conducted last month for The Boston Globe, found that just 15 percent of city residents wanted him executed. Statewide, 19 percent did. By contrast, 60 percent of Americans wanted Mr. Tsarnaev to get the death penalty, according to a CBS News poll last month.

No one here felt sympathy for him. Rather, many thought life in prison would be a fate worse than death, especially for someone as young as Mr. Tsarnaev, who is 21. Others feared that putting him to death would make him a martyr. Still others, interviewed around the city Friday night and Saturday, reflected the region’s historical aversion to the death penalty.

Neil Maher, who spent his teenage years in Boston and returned this weekend for his class reunion at Boston College High School, said the verdict had surprised and disappointed him.

“They ought to demonstrate a little humanity,” said Mr. Maher, 66, who now lives in Frederick, Md. “Killing a teenager’s not going to do anything. I think it’s just a kind of visceral revenge. I think that in three years, the people of Boston and the people on the jury will feel bad about this decision.”