A Long Island bagel shop customer was caught on camera lashing out at other patrons in a bizarre tirade about women rejecting him because of his short stature.

“Why is it OK for women to say, ‘Oh you’re 5 feet’ on dating sites — you should be dead. That’s OK?” the unidentified Bagel Boss customer roared in a video shared to Twitter on Wednesday.

The 45-second clip showed the vertically challenged customer at the Bay Shore location lash out at a female customer Wednesday morning before he was tackled by another, much larger man in the store.

“Everywhere I go I get the same f–king smirk with the biting lip,” he shouted.

Employees at the Bagel Boss chain said the man — who didn’t appear to be a regular — walked in around 9 a.m. Wednesday “screaming about the dating sites and how women hate him.”

“This is crazy but the man was very upset he was short; he went off on the women about dating sites,” a manager, who identified herself as Patty, told The Post.

The manager said a female worker was serving the man when the woman looked up and smiled at him.

“He just went totally nuts. He said ‘why are you smiling at me?'” she said. “He started saying it’s because I’m short and nobody wants me.”

Diana Reyes, who filmed the deranged episode, said that she and her three pals were waiting to order when they overheard him be rude to a female worker.

“My friend was like ‘She’s just trying to do her job, leave her alone,'” 18-year-old Reyes said.

But the comment released a rush of rage from the man as he hurled misogynistic comments at the line of customers.

“It was insane. I personally never have heard anyone say that but to be there in person, it’s insane to see that someone has that mind process,” said Reyes, who began recording in case “God forbid anything happened.”

In the video, another man could be heard telling the angry customer to “calm down.”

“Shut your mouth. You are not God or my father or my boss,” the fired-up customer said. “Dude, do you want to step outside?”

After getting an earful, the good Samaritan lurched at the customer and took him down.

“I just wanted bagels,” said the woman behind the camera as the two men brawled.

Workers at the Bagel Boss on Wednesday praised the unidentified patron who tackled the angry customer.

“He is our hero,” the manager told The Post. “If he didn’t tackle him, it would’ve gone on and on.”

To top it off, the wacky customer didn’t pay for his order—a whole wheat bagel with one egg white and Swiss cheese.

Suffolk County cops said they responded around 9:20 a.m. to the bagel store fight. There were no injuries and there weren’t any charges filed, authorities said.

The video of the encounter — which has received 10,000 retweets — has gone viral with internet rubberneckers, even attracting the attention of model Chrissy Teigen.

“do bagel boss-esque situations/fights happen often??? I need to witness one of these in person,” Teigen tweeted. “This could be the thing that drags me out of my house. where do I need to post up with my camping chair??”

The bagel shop, meanwhile, is taking the strange incident in stride, with one worker telling The Post: “Tomorrow we’re going to try and sell angry cookies.”