Tim Treadstone aka Baked Alaska. Baked Alaska/Periscope

The so-called alt-right movement descended into civil war on Monday after one of its largest figures was booted from an upcoming inauguration event following a series of tweets he wrote about the media being "run in majority by Jewish people."

Tim Treadstone, an unabashedly alt-right social media personality better known as "Baked Alaska," was disinvited from the "Deploraball" after publishing the tweets about Jewish people.

After being cut from the event, which initially featured him as a top guest, he lashed out on Twitter at fellow alt-right leaders, a sign of divide in the white nationalist, neo-Nazi, populist movement that backed President-elect Donald Trump.

Treadstone zeroed in on Mike Cernovich, a similarly prominent alt-right figure known for such remarks as "date rape does not exist," who was responsible for nixing him from the event.

Treadstone has a history of anti-Semitic tweets. Other alt-right figures, like leading neo-Nazi Richard Spencer, were previously booted from the upcoming party.

"Baked Alaska is not a member of the Deploraball committee and will not be attending the event," Cernovich tweeted. "We wish him well."

Soon after the announcement, Cernovich confirmed that Milo Yiannopoulos, a Breitbart tech editor and conservative provocateur, would attend the event instead.

The moves prompted Treadstone to go on a lengthy Twitter rant against Cernovich and Yiannopoulos, capping off with a roughly 45-minute scorched-earth Periscope video in which he called the former "a huge cuck" and "a massive cuck" for side-stepping "the Zionist question."

The term "cuck" is a popular expression used by the alt-right. It's derived from the word "cuckold."

"You can thank Mike Cernovich for banning me from my own event for tweets," Treadstone tweeted. "He seems to really care what the media thinks rather than his own."

Treadstone called Yiannopoulos, who was permanently banned from Twitter for mocking "Ghostbusters" star Leslie Jones, a "shallow scumbag" for joining the event only after he was removed.

Other alt-right accounts opted to stand in solidarity with Treadstone. One called the move "'new right' (liberal) censorship."

"Mike won't answer why I'm banned lol what a cuck," Treadstone tweeted.

"The gorilla man banned me oh no!" he added in a separate tweet, taking an apparent shot at Cernovich's book "Gorilla Mindset." "Have fun cucks!"

Cernovich later posted and deleted a Periscope video in which he characterized Treadstone as a "druggie" and "disgruntled employee" who had a "meltdown online." He also retweeted a message that took a jab at "haters who used to hang on Milo's every word ... but now trash him."

Treadstone fired back in his Periscope video, accusing Cernovich of not being a "fan of free speech."

"Mike got upset that I was tweeting some things about Jewish people," he said. "I don't hate Jews, but there are some things that I like to talk about. I'm alt-right. I've always been alt-right. I've never said I'm not alt-right, unlike Mike Cernovich, Paul Joseph Watson, Milo, and these other cucks. I've always been alt-right."

The "Deploraball" is scheduled for January 19, the night before President-elect Donald Trump is inaugurated, at the National Press Club in Washington, DC.

Trump confidant Roger Stone and Twitter personality Bill Mitchell are among the featured guests at the party in addition to Cernovich and now Yiannopoulos. The organizers originally listed the venue as a DC-area nightclub, but the nightclub said it had not signed a contract with them and would not host it.