We can rest assured that if Bill Belichick had a Twitter account, and the coach trying to keep him from a fifth Super Bowl ring had referred to his Patriots as “a–holes” in a team meeting blared mindlessly on Facebook Live by star receiver Antonio Brown, the last thing he would do is lash back:

Mike Tomlin — Terry Bradshaw was right. Cheerleader. Very Overrated!

Antonio Brown — Dishonest media loves his twerking. Sad! Why did Steelers take down his Facebook Live video? Loser! Worse than SNL!

Welcome to the 2017 AFC Championship game.

Belichick and Tom Brady have been called liars and cheaters long before Brown became the most lethal receiver in the NFL. They have armadillo skin. In fact, all the Patriots do. It is the way they are trained and conditioned. It is part of The Patriot Way.

For example, this was Belichick on WEEI radio Monday when asked by the hosts about being called “jerks” by Tomlin: “As you know, I’m not on SnapFace and all that, so I don’t really get those. I’m really just worried about getting our team ready to go. I’m not really too worried about what they put on Instantchat or whatever it is.”

And a follow-up question on whether the Pats have social media guidelines in the locker room: “We’re really focused on trying to play well and win this week in the AFC Championship game. That’s really what it’s about.”

And Tomlin railing about the injustice of having his game in Kansas City moved back because of the ice storm to give the Patriots a significant head start and rest advantage: “We don’t have anything to do with the scheduling. When we’re supposed to be there, that’s when we’re there.”

And as Brady said: “What’s done in the locker room should stay in the locker room.”

Now, the Steelers and Patriots are playing for the right to go to Super Bowl LI. If anyone needs bulletin board material for this one, he’s in the wrong line of work.

“I’ve always been under the impression that what you do between the white lines, that’s all that counts, that stuff doesn’t give you an edge,” ESPN NFL analyst Damien Woody told The Post.

“When the stakes are this high, and you got a chance to go to Houston for the Super Bowl, you don’t need cheesy tactics to get your guys motivated, guys are already there.”

Maybe the 17-minute boys-will-be-boys video depicts little more than a close-knit band of brothers celebrating their divisional playoff victory in Kansas City.

Or maybe this is an alarming red flag the Steelers lack the kind of focus, maturity and professionalism to upset Darth Belichick’s Evil Empire in Foxborough. That Ben Roethlisberger warning on the video about the lion’s den that awaits them will go in one ear and out the other. Brown, who will pay for this, is supposed to be a team leader. He was supposed to be a dancing fool only.

“The Patriots watched our game, they know everything about us,’’ Steelers guard Ramon Foster said. “They know for us to be in this game is not a secret. They’re going to study everything we do, so it’s not like we’re going to sneak up on them. It just so happened they heard what the coach was going to say. That’s it.’’

Apparently then, Tomlin could have just as easily been talking about … Ben McAdoo. Todd Bowles. Ron Rivera.

“As far as I’m concerned, everybody in this league is an a–hole, in my opinion,” Foster said. “You have to be to play this sport. Coaches don’t become head coaches by being nice guys.”

Belichick will not allow Steelergate to become a distraction? Can Tomlin?

“It’s kinda like the whole Odell Beckham thing — I thought the Giants did a magnificent job of just squashing that,” Woody told The Post, “and I think the Pittsburgh Steelers will do the same thing. I think the head coach has to dictate how this thing’s are going to play out.”

Belichick nevertheless will use anything and everything at his disposal. Woody, an ex-Patriot and ex-Jet, was asked how Belichick might handle this.

“Something like this, it could be brought up like night before the game,” Woody said, “just as a last reminder to guys what the Steelers think about the Patriots. Just so guys can have that in their mind that they go to sleep and get ready to play a game. That’s how I kinda envision it.”

Of course, Joe Namath ticked the Baltimore Colts off when he guaranteed Super Bowl III. How did that work out for the Colts?

Much ado about nothing, or much ado about something? No one knows for certain right now.

“We’re in a new era now with this whole social media, and you have to be really careful about this type of stuff,” Woody said.

Do you think Belichick and/or Brady and the Patriots will be offended by being called a–holes?

“They’ve been called worse,” Woody said, and laughed.

But never on SnapFace.