Hasan Piker, a left-wing commentator who is one of the most popular streamers on Twitch, has broadcast terrorist propaganda and downplayed the Oct. 7 attacks. (@HasanAbi via Twitch / @HasanAbi via Youtube) Hasan Piker, a left-wing commentator who is one of the most popular streamers on Twitch, has broadcast terrorist propaganda and downplayed the Oct. 7 attacks. (@HasanAbi via Twitch / @HasanAbi via Youtube)