A gunman who killed 11 worshippers at a Pittsburgh synagogue ranted incessantly on social media about his hatred of Jewish people before the 2018 attack, according to evidence introduced at his federal death penalty trial on Tuesday. Prosecutors are trying to show Robert Bowers was motivated by extreme hostility toward Jews when he opened fire at the Tree of Life synagogue during Sabbath services and committed the deadliest antisemitic attack in U.S. history. With the trial in its third week, testimony turned toward Bowers’ use of Gab — a social media platform popular with the ...