Transcript for Charleston Shooting Raises Fresh Controversy Over Confederate Flag
Tonight, disturbing new details about dylann roof may be emerging from a manifesto. Investigators say he likely wrote seeming to expose racial motivation behind his alleged killing spree in Charleston and if so he is far from the only one. We are about to take you inside the growing movement of white separatists on a night when a long contested symbol of the south once again comes under fire. We are here in a moment of unitien our state to say it is time to move the flag from the capital grounds. An historic moment in the wake of hate fueled violence. 150 years after the end of the civil war. Reporter: The South Carolina governor calling for the confederate flag to be removed from the capitol grounds. An old and divisive southern symbol drawing attention following the massacre of nine innocent people, members of a bible study class, gunned down in the historic Emanuel ame church. A tipping point where not only did we see this as divisive but dangerous. Many believe the confederate flag to be a symbol of oppression. Terrible. Struggle. Disenfranchisement. Symbol of slavery. To others a symbol of southern pride. In the hand of accused killer dylann roof. The haunting words and pictures of what authorities believe to be a manifesto posted on line by the 21-year-old ninth grade dropout. Updated hours before the shooting. Roof seen here in photographs pointing a gun at the camera, posing with a gun in one hand the confederate flag in the other. The rant online filled with hate for people who are black, hispanic, jewish, saying I chose Charleston because it is the most historic city in my state and at one time had the highest ratio of blacks to whites in the country. I can tell you he has talked about race. He is telling me about how -- about the trayvon martin case. He didn't agree with it. It made him upset. And me, I believe this all tumbled down about that. My hope is by removing a symbol that divide us we can move forward as a state in harmony and we can honor the nine blessed souls who are now in heaven. President Obama weighing in in a blunt exchange that aired on the podcast this morning. Racism we are not cured of it. And it's not just a matter of it not being polite to say -- in public. That's not the measure of whether racism still exists or not. Not just a matter of overt discrimination. Societies don't overnight completely erase everything that happened 200 to 300 years prior. One confederate monument in Charleston was vandalized Sunday with this is the problem, #racist. This afternoon mourners by the thousands came to pay their respects and further a message of racial harmony. When this young man showed up with a different message. Dylann roof is a victim in regards too. A white man born to a society that actively hates him, hates his people, culture and identity. There is a culture war being waged. There is a war on the streets against whites. 24-year-old, Matthew, he and friends drove to Charleston from Cincinnati, Ohio, a college educated, white separatist who has been called the future of organized hate in America. He says he condemns the rampage but his take away from it may surprise you. My first gut reaction when I heard about the shooting was, oh, no, there is no circumstance where taking the lives of civilians, innocent, women and children, that's never okay. It's very important to show that the white separatist community does not believe in using terrorism against civilians. We met him two years ago to find out why young people like him are drawn to racist movements. Racist, fascist, anti-gay. Do you consider yourself a racist? Yes. So what. I call it natural. Being a racist is natural. Loving one's people is natural. The fact is he says publicly what many think privately. He is tapping into a growing, frightening discontent in America. Since 2000 the number of hate groups in America has increased by 30%. That according to the southern poverty law center. Like dylann roof, he was not raised in a racist environment. People say he was raised like that? No I wasn't. I was raised moderate. Has it caused tension in the family? A lot of tension. A lot of tragic stories of young people, alienated people whose families weren't racist who didn't fit in and were searching for answers. I think unfortunately in our society, it happens all the time. We're racist. White power. He says, white heterosexual Christians have fallen prey as he puts it like native Americans did centuries ago. What happened to native Americans horrible? Yeah. That's what's happening to whites now in this country. Oh, come on. Someplace in the United States they're slaughtering white Americans by the hundreds? Genocide doesn't have to be with guns, tanks, bombs. He says he found his way into the white separatist movement through his love of history taking parts in civil war re-enactm re-enactments. The dark days of slavery he calls the good old days. In your view of the civil war the wrong side won? We would have been a lot better off if the south had won. He has a fondness for the confederate flag. Making a name for himself at white separatist demonstrations like this one on college campuses. And at this convention held by the online white separatist group storm front. Our generation is primed for this revolution. Acknowledges the message is accessible far beyond. The internet is the one of the greatest tools. You can find anything on there. You can find information then you can find hate. And you can find explanations for your failures in life. You can find like-minded people. Last year, he told us only in all-out race war will solve society's problems. Don't you see how your path eventually lead to violence? God willing it won't. But some things are worth fighting for. In Charleston, in the aftermath of the violence, allegedly caused by a like-minded young man he refuses to blame his ideology. The left that persecutes and hates white culture, identity and Christian faith. They're the one whose are responsible. You will push individuals only so long before they react. And white people are waking up. White people are reacting. And I pray and help they come and join me to do the struggle politically. You can't step on an individual forever before they decide to to bite back. That's what we see. He laid a wreath in Charleston before heading to California. Here in the shadow of a mass murder, standing shoulder to shoulder with those who share his sympathy for those who died but little else. This happened to be at the hands of one individual but we see racialized violence occurring in our country every day. And we must have that conversation. Stow when F so when forgiveness is the headline. And we don't talk about race and racism that is a challenge for us. President Obama will speak in Charleston this Friday.
This transcript has been automatically generated and may not be 100% accurate.