SANTA CLARA, Calif. — Kyle Williams is ignoring the barrage of hateful, hurtful, even threatening comments he has received via social media in the aftermath of his ill-timed fumble that cost the San Francisco 49ers the NFC championship game against New York.

Williams said Monday he takes full responsibility for his fumble on a punt return in overtime of a 20-17 loss to the Giants on Sunday night that set up Lawrence Tynes’ winning field goal, calling the moment “painful.”

“I really didn’t pay attention to Twitter. All the feedback I needed was family and friends, the guys in the locker room,” Williams said.

Instantly, Williams was made a villain on the Internet.