The agents scrolling through his feeds would have learned that Hanna is part of Israel’s small Arab Christian minority, a nonbinary LGBTQ-rights advocate, and an outspoken critic of the Gaza occupation, who uses his social media accounts to post images of atrocities and hold up a mirror to scientific colleagues including those at the Weizmann Institute of Science, the pure-science powerhouse where he works—Israel’s version of Caltech or Rockefeller University. In his luggage, they would have found his keffiyeh, or traditional headscarf, which Hanna last year vowed to wear at lecture podiums on his many trips abroad.