Antifa’s trademark masks — used to shield the hard-left activists’ identities at protests nationwide that sometimes turn violent — would be banned in Boston under an ordinance proposed by City Councilor Tim McCarthy that would make all face coverings at illegal at demonstrations.

McCarthy will introduce a hearing order at Wednesday’s council meeting to hold hearings before the Public Safety and Criminal Justice Committee he chairs in hopes of hammering out an ordinance change.

“It comes down to the safety in the Boston Police Department,” McCarthy told the Herald. “I just don’t understand where this has become the norm. … This isn’t people using their First Amendment right to protest — this is people coming to cause trouble.”

This comes after people showed up among the protesters against the Straight Pride Parade clad all in black and with their faces obscured by masks. Cops say it was mainly those — many from out of state — who caused trouble and fought with police and the conservative parade-goers. Many of the 36 people arrested at the parade protest were vouched for by antifa — short for “anti-fascist” — which is a loose collection of left-wing agitators who in recent years have shown up at protests and other events to shut down conservative speakers, sometimes assaulting rivals.

“We’re covered in black so when we attack these guys we can’t be prosecuted,” said Jon Crowley, a self-identified antifa member who told the Herald at the parade that he felt violence was the only way to deal with the people marching in the parade, which went from Copley Square to City Hall Plaza. “They are fascists, 100%. How else are you going to get them to shut up?”

Boston antifa adherents didn’t respond to requests for comment on Monday night.

McCarthy said he believes if everyone at protests has to show their faces, they will be less likely to misbehave.

“The Boston Police Department should be able to say, ‘Lower your masks or we’re going to break this up,'” McCarthy said.

McCarthy’s hearing order, which cites the Herald report about Crowley, is “to discuss prohibiting the wearing of a mask, hood or other device to conceal any portion of the face to conceal the identity of the wearer upon or within Public Property in Boston.” He said the language of the law would have to be refined so it wouldn’t encompass, say, a person walking down the street in a hoodie or a guy in a Santa beard at a Christmas parade.

Civil rights attorney Harvey Silverglate said he believes a properly written law would pass constitutional muster — but he believes it’s still “bad public policy.”

“The question of whether it’s wise or not is a different question … my own view is that it would be a pretty sorry state if a person isn’t allowed to go outside in a mask,” Silverglate told the Herald. “It invades one’s personal decision-making.”

State Sen. Dean Tran (R-Fitchburg), is advocating for a similar statewide ban on Beacon Hill, tweeting last week, “It is time, federal, state, and local to make it illegal to cover your faces in public events and demonstrations. A danger to public safety and our police officers. No one or group is above the law.”