Matt Nagy doesn’t regret his reaction that earned 1 of 9 Chicago Bears penalties. Said Robert Quinn: ‘Honestly, some of these calls are starting to get a little crazy.’

Chicago Bears coach Matt Nagy said he doesn’t regret his fiery outburst at officials that earned him an unsportsmanlike conduct penalty Monday night at Soldier Field.

Nagy was flagged between the first and second quarters of the 17-9 loss to the Minnesota Vikings after safety Deon Bush was called for a hit to a defenseless receiver. The Bears had stopped the Vikings on the third-and-7 play at midfield, but the penalty on Bush gave the Vikings first-and-10 at the Bears 35-yard line.

When the quarter ended two plays later, Nagy gave officials a piece of his mind.

“Our guys are fighting their asses off to get off the field, and I saw what happened,” Nagy said. “So I explained my opinion on it, and I don’t regret it.”

Referee Scott Novak told a pool reporter Nagy was flagged for using inappropriate language.

“I won’t repeat what was said,” Novak said. “But when it crosses a line and it’s inappropriate, then that’s when we throw a flag.”

Nagy’s penalty pushed the Vikings to the 12-yard line, and they scored on Greg Joseph’s 37-yard field goal four plays later.

It was one of nine Bears penalties for 91 yards. The Bears defense was penalized twice on the Vikings’ only second-half touchdown drive. Teez Tabor was called for an illegal low block, and Trevis Gipson was called for unnecessary roughness.

“Honestly, some of these calls are starting to get a little crazy,” Bears outside linebacker Robert Quinn said. “These refs seem like they’re controlling the game a little too much. If a play is clean and they’re throwing a flag over something that they thought they can change the game just by one flag, I mean, let guys play ball.

“If this was a couple years ago, half this stuff wouldn’t even be called, but now they’ve got some of these stupid rules, and in the refs’ hands it can change at any given moment. I think they need to go check the refs they’re hiring, not our coach.”

Bush and Alec Ogletree were breaking up Kirk Cousins’ pass to Tyler Conklin when Bush was penalized after making contact with Conklin’s head, Novak said.

“With a defenseless receiver, the defender is always responsible for avoiding any illegal contact or illegal act,” Novak said. “And when he makes contact with the head, even if he’s going for the ball, it’s still a foul. If he’s attempting to dislodge the ball, or intercept, he still cannot make illegal contact, forcibly, to the offensive player since he’s defenseless.”

Bush said he didn’t get an explanation from the official he asked about it on the field, but he said the Bears will try to correct their mistakes.

“It’s kind of tough, man,” Bush said. “Sometimes you want to know the right thing to do. You want to have the right safety, but at the same time, you want to be able to go out there and make plays, not letting them just catch the ball. I guess we’ll have to see how to work on that, how to fix that.”

The most notable penalty on offense came when rookie left tackle Teven Jenkins went after D.J. Wonnum for a hard hit on quarterback Justin Fields as Fields went out of bounds in the third quarter.

Jenkins was called for unnecessary roughness, and the Bears’ drive was pushed back to second-and-22 at their 13-yard line.

Nagy said he understood Jenkins’ emotion and desire to protect his quarterback but said the Bears also have to be smart with their reactions.

“After that one, I went around and talked to all the guys and just said, ‘OK, it’s time to reel it back in, all of us, myself included,’ ” Nagy said. “I love the fight. I love their energy. … Every action has a reaction. Just be smart because what it does is it puts us in tough situations by losing yards, and again, myself included with what I did.”

Fields said he appreciated Jenkins’ reaction.

“I told him I liked what he did there and I appreciate him, but at the same time he’s got to be smart,” Fields said. “But I definitely love the mindset and I love him sticking up for me. I think that’s what we need more of. But I just told him, I love it but just do it between the whistle.”