In an interview on the white nationalist podcast Exodus Americanus:

“If you listen to the first time I was on the show, all right, like, I did not get the Jew thing. Like I thought of Jews as white people with bad ideas, right?  Like, I had no idea Karl Marx was a Jew. I had never associated Jews with communism, right? And it was like the second that I made that connection, I was like, they all have to die … I’m not even a Hitlerite but I’m like ok, let’s fucking gas the kikes and have a race war because once I realized they were responsible for the communism, then I was like, oh, wait a second, yeah, that’s a fucking really good reason to fucking genocide a group of people.”“Christopher Cantwell,” Southern Poverty Law Center, https://www.splcenter.org/fighting-hate/extremist-files/individual/christopher-cantwell.