The American tourist who was stabbed in the face while protecting two women on a tram in Germany is speaking out about what he calls Europe’s “immigration problem.”

In an interview after his release from the hospital, 21-year-old John Rudat told “Fox & Friends First” Wednesday he believes the attack highlights Germany’s failure to address immigration. He said he later learned one of the suspects — a Syrian asylum seeker already known to police — was arrested, released by prosecutors and then re-arrested. Another suspect remains at large.

“People have been telling me over the past 10 years [that] it has been getting worse and worse and worse. And, since this incident, thousands of people, especially women, have reached out to me claiming that they haven’t been feeling safe on the trams. They haven’t been feeling safe in their own home city, their own country,” he said.