Police find images of Hitler and 'extremely graphic' videos of previous mass killings on Jonathan Douglas Sapirman's device

US president touts administration's efforts to combat antisemitism, reiterate decision to run for White House in 2020 was shaped by 2017 neo-Nazi march in Charlottesville

Play tells story of 1915 lynching of Leo Frank in Georgia, in case that spurred a revival of white supremacist group KKK and the creation of the Anti-Defamation League

'Gangsters vs. Nazis' book tells how a New York judge secretly directed mafia bosses Meyer Lansky and Bugsy Siegel to recruit an army of Jewish thugs to intimidate antisemites