Britain’s government has barred pro-Palestinian American streamer Hasan Piker and his uncle from entering the country, prompting criticism from free speech advocates over what they say is a crackdown on dissent related to Israel’s campaign in Gaza. The United Kingdom’s Home Office canceled travel permits belonging to Piker, 34, and Turkish-American broadcaster and attorney Cenk Uygur. The pair were scheduled to speak this week at the South by Southwest technology and business festival (SXSW) in London and address the Oxford Union, a debating society at the prestigious British university. In a statement to CNN, the Home Office said it revoked Electronic Travel Authorisation (ETA) for Piker and Uygur — which permits non-UK citizens to visit the country without a visa for up to six months — “on the grounds that their presence in the UK may not be conducive to the public good.” Such decisions “are based solely on an assessment of potential risk an individual may pose to UK society,” the Home Office said, adding that “individuals may choose to apply for a visa if they still wish to travel to the UK.”