Dallas Frazier was looking for someone to hurt the evening of Aug. 1, 2019, prosecutors said.

Several times, the pickup he was in drove by the 100 or so protesters gathered outside U.S. Bank Arena. Lines of people were waiting to get inside for a rally for President Trump.

“No Trump! No KKK!” the protesters shouted.

The Trump supporters shouted back. It was heated and contentious. But there was no violence. An eyewitness who was there for the rally called it a “circus.”

Then the pickup stopped at a nearby red light. The passenger, Frazier – who was found guilty Thursday of misdemeanor assault – shouted at the protesters.

Frazier, according to the eyewitness, focused on one protester, 61-year-old Michael Alter, a manager for the U.S. Postal Service who is 5-foot-6. Alter, who is diabetic and has vision problems related to the condition, said he has never been in a fight in his life.

Frazier, then 29, asked Alter if he “wanted some.”

Alter testified that he never said anything specifically to Frazier. Then the pickup door opened and Frazier jumped out.

“All of a sudden, he wants to attack me,” Alter said.

Frazier approached with his fists up. Alter took off his baseball cap, “so I could see better,” he said.

“Come on,” Alter recalled saying. As in: “Come on, really? You’re going to want to hit me?”

Assistant City Attorney Jon Vogt told jurors in closing arguments that Frazier landed four punches to Alter’s head and face. Alter’s prescription sunglasses were broken. He did not punch back.

“I was in disbelief,” Alter testified. “I was down there exercising my First Amendment rights, then I get attacked by somebody, just for being down there?”

The attack left Alter with a torn artery in his eye.

“It was like looking through a dirty window,” he said.

Four months later, he had eye surgery. He replaced the $350 prescription sunglasses.

Frazier’s attorneys argued that it wasn’t an assault, that Alter instigated the confrontation. They pointed to the “come on” gesture Alter made with his left hand after Frazier got out of the truck.

Vogt told jurors that Frazier’s own words in phone calls from the Hamilton County Justice Center showed it wasn’t a mutual fight.

In one, Frazier said: “I wish you all could have seen his face… He looked at me like, ‘Oh my God.’ He couldn’t believe what was going on.”

A police officer’s body camera captured Frazier, after being handcuffed, saying, “It was my fault, 100 percent.”

Frazier will be sentenced Jan. 17 by Hamilton County Municipal Judge Brad Greenberg. He faces up to 180 days in jail.