Commentary The Chinese regime blocks Chinese citizens from accessing nearly all Western social-media platforms—Facebook, Google, Twitter, YouTube, Instagram, and others—not to mention such conventional international news sources as the BBC, The New York Times, and The Wall Street Journal. China’s “Great Firewall,” as it is called, is said to be the most technologically sophisticated system of media censorship in the world. Yet censor as it may inside China’s own borders, the Chinese regime has no qualms about using Western social media, YouTube and Twitter in particular, to wage a propaganda war elsewhere, particularly on the issue of its treatment of the 13 million Turkic-speaking Uyghur Muslims who live in Xinjiang in far-western China. It is a viselike two-pronged war. On the one hand, China has issued a stream of propaganda videos appearing on YouTube and Twitter designed to paint the Uyghurs as extremist terrorists, and the Chinese regime as a …