Bob said, Where to begin...how about the first sentence/link. Nothing in that article states the race of the 19-year-old lunatic, nor is there anything that says he's a white nationalist/has any ties to white nationalists. I suppose that one could assume the lunatic is white, because the media is very specific in identifying the race of such an attack when the attacker is white and the victims are people of color (and vice versa) because race is what the media and liberals see first. PJ's "White nationalist" shot some other white people.
He looks white to me.

Bob said, "Then you go back to the lunatic, claiming he's alt-right..."
Earnest posted a 4,000-word anti-Semitic, Islamophobic and white supremacist manifesto he wrote and published online before the shooting and said in a post on 8chan that he would be live streaming the attack...
Witnesses said the gunman was yelling that Jews were “ruining the world[.]”
Earnest said in his manifesto that he was inspired by the Tree of Life gunman along with the New Zealand mosque shooter, who killed 50 people in Christchurch on March 15, 2019.
“Four weeks. Four weeks ago, I decided that I was doing this. Four weeks later I did it. I remember a specific moment in time after Brenton Tarrant’s sacrifice that something just clicked in my mind. ‘If I won’t defend my race, how can I expect others to do the same?’ I immediately got to planning, and I never looked back. I never had doubts. I never felt afraid. I never felt anxious—just the occasional nervous excitement,” Earnest wrote.
“I do not care about the debt-based currency that Jews like to pretend is money. I do not care for the bread and circus that Jewry has used to attempt to pacify my people. I willingly sacrifice my future—the future of having a fulfilling job, a loving wife, and amazing kids. I sacrifice this for the sake of my people. OUR people. I would die a thousand times over to prevent the doomed fate that the Jews have planned for my race.”
I scorched a mosque in Escondido with gasoline a week after Brenton Tarrant’s sacrifice and they never found shit on me (I didn’t realize sandn*ggers were sleeping inside though—they woke up and put out the fire pretty much immediately after I drove away which was unfortunate. Also they didn’t report the message I spray-painted on the parking lot. I wrote ‘For Brenton Tarrant -t. /pol/’).
“I did not want to have to kill Jews. But they have given us no other option. I’m just a normal dude who wanted to have a family, help and heal people, and play piano. But the Jew—with his genocidal instincts—is insistent on poking the bear until it tears his head off. The Jew has forced our hand, and our response is completely justified<" he wrote. "My God does not take kindly to the destruction of His creation. Especially one of the most beautiful, intelligent, and innovative races that He has created. Least of all at the hands of one of the most ugly, sinful, deceitful, cursed, and corrupt. My God understands why I did what I did."
Earnest wrote that he is a Christian and blames all Jews for the execution of Jesus Christ. "And finally, for their role in the murder of the Son of Man—that is the Christ. Every Jew young and old has contributed to these. For these crimes they deserve nothing but hell," Earnest wrote.
Earnest said in his manifesto that he believes a "revolution" will continue and if he survives, he would be freed from prison to "continue the fight."
To my family and friends. I can already hear your voices. ‘How could you throw your life away? You had everything! You had a loving family. You had great friends. You had a church. You were doing well in nursing school. You could have gone so far in your field of study. You could have made so much money and started a happy family of your own.’ I understand why you would ask this. But I pose a question to you now. What value does my life have compared to the entirety of the European race? Is it worth it for me to live a comfortable life at the cost of international Jewry sealing the doom of my race? No. I will not sell my soul by sitting idly by as evil grows. I’d rather die in glory or spend the rest of my life in prison than waste away knowing that I did nothing to stop this evil. It is not in my blood to be a coward.
Source
Nah, this guy isn't alt-right or a white nationalist at all. LOL Although, Trump calls guys with similar beliefs very fine people.
Bob asked? "Next is a little diatribe about the "problem" with alt-right. They bunch together and form a cluster. Which bunch did the lunatic form a "cluster" with?"
If you read the article I linked to above, the cluster is found on the Internet more specifically the Chans 4 and 8. This is where the cluster congregates and radicalizes their new recruits. He mentions /pol/ in his manifesto several times. That is the directory (found in the URLs) where the political talk occurs on the chans. Perhaps, you think it is an insignificant handful of people that hang out at these virtual white nationalist clubhouses, it is not. 4Chan alone gets 22 million unique visitors per month. Earnest mentioned he found the sites a year and a half ago. Prior to associating with the cluster, he was a normal high achieving (academically speaking) kid. After spending a year and a half immersed in the alt-right culture found in the cluster, he was shooting up a synagogue.