Jon Stewart was prompted to join Twitter on Thursday to defend the renegade Reddit traders who turned Wall Street upside down this week. The former “Daily Show” host hit back at critics of the rogue day traders who used WallStreetBets to send GameStop’s stock skyrocketing in defiance of large hedge funds shorting the business. “This is ********. The Redditors aren’t cheating, they’re joining a party Wall Street insiders have been enjoying for years,” Stewart tweeted.