Donald Trump hasn’t been inaugurated yet, and already two bellicose titans of the MAGA universe are waging total war — against each other.

Stephen K. Bannon, Trump’s rumpled onetime chief strategist, vowed last week in an interview with the Italian newspaper Corriere Della Serra that he will “get Elon Musk kicked out” of Trump’s inner circle by the time Trump is sworn in on Jan. 20. “He is a truly evil guy, a very bad guy,” Bannon said of Musk.

And that was one of the nicer things Bannon said about the world’s richest man, who spends so much time at Trump’s side that he might be mistaken for a member of the Secret Service detail, minus the earpiece and the muscle tone.

“He should go back to South Africa,” Bannon said of the immigrant tycoon. “Why do we have South Africans, the most racist people on earth, White South Africans … making any comments at all on what goes on in the United States?” Bannon added that Musk “has the maturity of a child,” which indeed might be provable in a court of law.

Is Bannon’s rage simply over the fact that Musk has replaced him at the Mar-a-Lago dinner table? I wouldn’t discount jealousy as a motive, but there is also a substantive issue involved. Bannon, whose credentials as a MAGA warrior are genuine - he served four months in federal prison for defying a subpoena from the Jan. 6 committee - has long been a hard-liner against immigration. Musk is an equally fierce defender of the H-1B visa program that allows tech firms to bring skilled foreign workers into the country.

“The reason I’m in America along with so many critical people who built SpaceX, Tesla and hundreds of other companies that made America strong is because of H1B,” Musk declared on X last month, responding to a post critical of the program. “Take a big step back and F--- YOURSELF in the face. … I will go to war on this issue the likes of which you cannot possibly comprehend.”

Bannon responded on his podcast with a playground taunt of his own, telling Musk that longtime MAGA true believers will “rip your face off” if he continues to back a program that Bannon claims takes good, high-paying jobs away from American citizens.

“They’re recent converts,” Bannon said of Musk and the other tech moguls who supported Trump in the November election. “We love converts. But the converts sit in the back and study for years and years and years to make sure you understand the faith and you understand the nuances of the faith and understand how you can internalize the faith.” Musk and the others, he said, should not “come up and go to the pulpit in your first week here and start lecturing people about the way things are going to be.”

This war of words between two insufferable blowhards reveals a consequential schism in the MAGA world — and the yawning gap between MAGA rhetoric and objective reality.

It is an article of faith among some of Trump’s most loyal and avid supporters that immigration is a bad thing, period. In this view, the H-1B program is nothing more than a way for tech companies to hire foreign workers who can be paid less than American citizens and who cannot complain or quit because of their immigration status. Bannon speaks for this group when he calls for “a 100 percent moratorium on all immigration until we get this thing sorted.”

Musk and other tech leaders see the program as a way to maintain U.S. technological primacy by attracting the most creative and talented engineers from around the world.

Vivek Ramaswamy, Musk’s partner in the advisory “Department of Government Efficiency,” goes much further.

“Our American culture has venerated mediocrity over excellence for way too long (at least since the 90s and probably longer). That doesn’t start in college, it starts YOUNG,” Ramaswamy wrote on X last month. “A culture that celebrates the prom queen over the math olympiad champ, or the jock over the valedictorian, will not produce the best engineers.”

Trump, typically, is trying to have it both ways. He sounded like Bannon during his first campaign in 2016, vowing to “end forever the use of the H-1B as a cheap labor program, and institute an absolute requirement to hire American workers first.” Then he sounded like Musk last month, telling the New York Post that “I’ve always liked the visas, I have always been in favor of the visas.” And then, with a straight face, he claimed that “I didn’t change my mind.”

Meanwhile, the Musk and Bannon factions — call them “New MAGA” and “MAGA Classic” — definitely are not changing their minds. This is ugly, and it promises to get earlier.

Eugene Robinson is a Washington Post columnist.