Ethereum co-founder Vitalik Buterin has urged Elon Musk to "turn down the temperature" on X, following Musk's heated defense of foreign tech workers' rights in the U.S. Buterin praised Musk's commitment to free speech but cautioned against using the "banhammer" to silence critics, warning it could lead to a breakdown in public discourse. Musk's stance on H1B visas sparked backlash from conservatives, who accused him of censorship. Buterin emphasized the importance of leaders setting a positive tone, suggesting that a brighter approach, rather than a combative one, is needed for progress.