The network of The Last Crusade is growing in Europe, but its participants have strong U.S. connections that go back years. In an exclusive interview, we meet Matt Heimbach, an American extremist who is spreading conspiracy theories and inciting violence. But is there anyone out there willing to take him on? We meet the Nazi hunter who has spent his life working to stop Heimbach’s brand of hate. Learn more about your ad choices. Visit megaphone.fm/adchoices