From The Federalist:

But Everytown ignores those quotes. Nor does the organization mention that the Buffalo mass murderer self-identified as an “eco-fascist national socialist” and a member of the “mild-moderate authoritarian left.” The shooter expressed concern that minority immigrants have too many children and will damage the environment. “The invaders are the ones overpopulating the world,” he wrote. “Kill the invaders, kill the overpopulation and by doing so save the environment.”