JON Koppenhaver is back in jail.

The mixed martial arts fighter, who legally changed his name to War Machine in 2008, has been to prison twice before. On Saturday (AEST), after more than a week in hiding, he was arrested for allegedly assaulting his former girlfriend, porn star Christy Mack.

The brutal attack left Mack with broken bones, missing teeth and a severely ruptured liver, among other injuries.

MORE: Christy Mack’s horrifying account of the attack

When War Machine was last incarcerated, back in 2010, he wrote a weekly “prison blog”, which was filled with profane and often-alarming thoughts.

media_camera War Machine’s mugshot, distributed by the Simi Valley Police Department.

In one particularly bizarre post, the former UFC fighter ranted about the “oppression” of men.

“So it’s Christmas Day and I’m laying in my bunk wondering, ‘Why the hell do American men get married!?” War Machine wrote.

“There is one guy in here for slapping his wife, one here for yelling at his wife, and one here for beating some guy’s a** that disrespected his wife. WTF!? If your wife is being a b***h you can’t slap her, if your wife is yelling at you, God forbid you yell back, and if some a**hole hurts your wife, you cannot protect her!

“Next thing you know it will be illegal to f**k your wife! LMAO! Maybe then, MEN in this country will get the f**king hint and MOVE! This country forces you to be a b***h! And then you go to jail!”

media_camera War Machine with his former girlfriend, Christy Mack.

War Machine went on to compare the plight of men in the US to that of African American slaves and Jewish people under Germany’s Nazi regime.

“The oppression of MEN is worse than oppression of Jews in Nazi Germany, worse than the slavery of blacks in early America ... I’m not exaggerating either,” he said.

“Every Jew and every black man, both in jail and those who have managed to avoid it, will attest to what I have just (written).

“In order to be elusive and to have longevity, the oppressor has learned to kill MEN while their bodies remain alive. And with your ‘spirit extinguished’ you’re nothing but a f**king zombie, a shell of a man, waiting to die.”

media_camera War Machine has been incarcerated twice before.

That lovely material is all from a single blog post. You can read the rest of his musings here, if you’re so inclined.

War Machine allegedly entered Mack’s house in the early hours of the morning on August 8 before assaulting the adult film actress and her male companion, reality TV star Corey Thomas.

“He made me undress and shower in front of him, then dragged me out and beat my face,” Mack said in a harrowing statement last Monday.

“He pushed the knife into me in some areas such as my hand, ear and head ... he told me he was going to rape me, but was disappointed in himself when he could not get hard.

“After another hit or two, he left me on the floor bleeding and shaking, holding my side from the pain of my rib.”

media_camera Adult film actress Christy Mack was the victim of an assault on August 8.

Mack eventually managed to escape through a back door while her attacker rummaged around in the kitchen.

“Assuming he was finding a sharper, more stable knife to end my life, I ran out of my back door, shutting it behind me so the dogs didn’t run inside to tip him off,” she said.

“I hopped the fence to the golf course behind my house and ran to a neighbouring house. Naked and afraid he would catch me, I kept running through the neighbourhood knocking on doors. Finally, one answered and I was brought to the hospital and treated for my injuries.”

media_camera War Machine had dated Mack in the past.

Those injuries included 18 broken bones around her eyes, a broken nose, missing teeth, a fractured rib, a severely ruptured liver and lesions from the knife that was pressed into her skin. The hospital described them as “severe but not life-threatening”.

While he was on the run, War Machine protested his innocence on Twitter, claiming he went to his former girlfriend’s house to propose.

I'm not a bad guy, I went to surprise my gf, help her set up her show and to give her an engagement ring and ended up fighting for my life. — War Machine (@WarMachine170) August 11, 2014

I only wish that man hadn't been there and that Christy & I would behappily engaged.I don't know y I'm so cursed.One day truth will come out — War Machine (@WarMachine170) August 11, 2014

That explanation didn’t impress the police, who eventually found War Machine at a hotel in California with “a small quantity of cash and some pizza”. A hotel guest who witnessed the arrest told local TV station KTLA the authorities used a taser to bring him down.

media_camera Christy Mack with her ex-boyfriend and alleged attacker, War Machine.

“They were like, banging on the door, trying to get it open, and they’re like, ‘Open the door, open the door!’” Nicolle Blankenship said.

“Finally when they got it open they yelled, ‘Gun!’ and then all of a sudden you see them shoot him with a taser. And he got shot with a taser and he went down to the floor, and then they handcuffed him.”

War Machine will face court on August 19. Meanwhile, one of Mack’s colleagues in the adult film industry, Kendall Karson, has started a fundraising page in an effort to help her friend recover. You can access it here.

Originally published as War Machine’s outrageous blog