The teenager accused of killing 10 people in the Buffalo supermarket massacre posted a rambling white supremacist manifesto only that spewed a racist philosophy and outlined his plans step by step. Payton Gendron, who officials said traveled “several hours” claimed in a 180-page diatribe that he was “radicalized” on the internet while he was bored during the early days of the pandemic, not by any people he has met personally. Through his “research,” the self-described white supremacist and anti-Semite came to see low white birth rates around the world as a “crisis” that “will ultimately result in the complete racial...