[Lemon:] White supremacist and alt-right groups taking their message of hate online using social media to recruit kids as young as 11. After seeing the social media account of her young son filled with sexism and racist content, one mother posted an open warning to parents. The overwhelming response proves she is not alone. Sara Sidner has more now. Sara?
[Sara Sidner, Cnn National Correspondent:] Don, it's been nearly 75 years since the end of World War II and the Holocaust. So why it is that Nazi culture is seeping into American youth culture now? A mother of teen and twin boys says she has the answer, and she has a warning for parents.
[Joanna Schroeder, Mother And Writer:] Do you have white teenage sons? Listen up.
[Sidner:] Joanna Schroeder has a message to moms just like her of teen and twin boys. Pay attention to your children's online gaming or social media because even if you aren't, white supremacists are.
[Schroeder:] Everywhere from the alt-right which is kind of a more comfortable way of saying, not quite a Nazi to true neo-Nazis, they have studied the way that our young men interact online, they have looked at what these boys need, and they have learned how to fill those needs in order to entice them into propaganda.
[Sidner:] As a writer of online content, she was surprised when she heard some of the coded language she was often confronted with coming out of her own sons' mouths. [On Camera] What are some of the warning phrases or words?
[Schroeder:] The first word I heard was "triggered." And this is a tough one because you will hear this from your conservative uncle and you may also hear this from a kid that is getting a lot of alt-right messaging online. That's everyone is too sensitive today.
[Sidner:] There is whole Lexicon shared by members of these online communities. One common thread among the words and ideas they favor, she says, are complaints about people who are too sensitive.
[Schroeder:] And that's a very alt-right talking point. That is an entry way kind of terminology. It's not racist. No, it's not. But it's often used against people who are calling out racism or sexism or homophobia as a way to imply that, you know, those of us who don't accept that language are just too sensitive.
[Sidner:] Her teen like others we've talked to was drawn in by snarky memes. She and her son scroll through his Instagram explore feed which recommends content based on what it thinks a user will enjoy. She was stunned.
[Schroeder:] And I saw an image of Hitler. And I stopped him. And I said, was that Hitler?
[Sidner:] It was a meme implying a time traveller would have tipped Hitler off to keep him alive.
[Schroeder:] I know my kids understand Hitler. But as I scroll his, I saw more memes that joked about the Holocaust and joked about slavery.
[Sidner:] So normalizing.
[Schroeder:] Yeah.
[Sidner:] Horrible things.
[Schroeder:] And desensitizing or kids to things we should be sensitive, too.
[Sidner:] She decided to take to Twitter to warn other parents and it went viral.
[Schroeder:] I've been watching my boys' online behavior and noticed that social media and bloggers are actively laying groundwork in white teens to turn them into alt-right white supremacists.
[Sidner:] The reactions were strong. One self-described gamer said, "This exact thing happened to me in high school in this exact way." Others attack Schroeder, calling her all the names she warned her kids about. It clearly hit a nerve because her thread ended up being posted and criticized on one of the most virulent neo-Nazi sites. The white supremacists' propaganda is on just about every popular social media site.
[Schroeder:] It's just the door that opens for the white supremacists to walk in and take your kid's hand. It's your our kids inability to sniff it out propaganda.
[Sidner:] Ultimately, she says parents need to educate themselves about their children's online life.
[Schroeder:] I'm sorry, parents. You have to have a snap chat account.
[Sidner:] In Instagram, Reddit, and Discord. Then talk about it.
[Schroeder:] The kids and I are conspirators together. These alt-right guys are trying to trick you, like they think you're dumb, and you're smart, you're smart.
[Sidner:] Now, she says that she has been attacked online for trying to brainwash her kids or trying to bend her children's mind. She says, of course, I'm trying to bend my children's minds. I taught them to cover their mouth when they cough or to wash their hands before they eat. All I'm doing now is trying to teach them analytical skills when it comes to the internet. She says she wants her kids to know the difference between right and wrong. Don?
[Lemon:] Sara, thank you very much. I appreciate that. So take this video. A coach is disarming a student at school and moments later enveloping that student in a hug. We have that story, next.