The panelist in question, Jeffrey Sachs, is not a newcomer to MSNBC or even to Morning Joe, as Jimmy's trying to imply, and he didn't just disappear. He's been on the show since this clip, and all that nonsense is just Jimmy trying to create the perception that opposing opinions aren't allowed on media platforms that he doesn't like. In reality, the clip Jimmy is playing, along with Sax's other appearances, which Jimmy is pretending don't exist, are a strong counterpoint to the entire premise that dissenting opinions aren't allowed in the mainstream media. Sachs disagrees with the idea of insisting on Assad's removal from power, while the prevailing opinion on the panel is that Assad should be removed, and he's free to speak his position, and he wasn't blacklisted afterwards.