On Tuesday, writing for CNN, Trump biographer Michael D'Antonio slammed Donald Trump Jr. for posting a crude visual gag about the violent attack on House Speaker Nancy Pelosi's husband in San Francisco.

"Donald Trump Jr. must have thought he was being funny. After a man invaded House Speaker Nancy Pelosi’s home in San Francisco and beat her 82-year-old husband with a hammer, former President Donald Trump’s eldest son posted a photo of a hammer and men’s briefs on social media," wrote D'Antonio. "'I’ve got my Paul Pelosi Halloween costume ready,' the caption read, apparently a reference to an erroneous report, since corrected, that the attacker was in his underwear."

This sort of "depravity", wrote D'Antonio, proves that he is a "chip off the old block" in that it's identical to that of former President Donald Trump, who has a long history of joking about violence against political opponents, reporters, and various other people he doesn't respect.

"For years, the elder Trump has voiced his support for violence," wrote D'Antonio. "In 2018, he called a GOP candidate who attacked a journalist 'my kind of guy.' As recently as October 22, the former President reveled a crowd by joking that reporters could be forced to reveal confidential sources if judges would put them in jail, where they’ll become 'the bride of another prisoner.'"

Nor are the Trumps alone in their glee over violence, D'Antonio noted — because figures throughout the Republican Party are following their lead, including Virginia Gov. Glenn Youngkin joking at a rally that they'll soon send Pelosi "back to be with him."

The Texas insurrectionist senator Cancun Cruise amplified right-wing conspiracy theories suggesting the assailant had a sexual relationship with Paul Pelosi, who suffered brain injuries in the attack.

There is also a straight line between QAnon Cuckoo Marjorie Taylor Greene's conspiracy theories and the attack on House speaker Nancy Pelosi's husband:

"On the right, it's some party leaders and elected officials who are the conspiracy theorists," he added. "It's Marjorie Taylor Greene, who accused Nancy Pelosi of having her own private gestapo police to target Republicans. Now, she said it was a 'gazpacho' police, because it's Greene and that's who she is, but her supporters got the message. She said Nancy Pelosi was guilty of treason and reminded her supporters that the penalty for treason is death. Marjorie Taylor Greene is about to become a committee chair. She may be a kook but potentially one with a lot of power soon."

It’s beginning to look like Republicans go along with Trumpism not because they feel they must, but because they’ve really come to embody it.

"For years, the elder Trump has voiced his support for violence," wrote D'Antonio. "In 2018, he called a GOP candidate who attacked a journalist 'my kind of guy.' The former President reveled a crowd by joking that reporters could be forced to reveal confidential sources if judges would put them in jail, where they’ll become 'the bride of another prisoner.'"

July 2017: During a speech to law enforcement officers in Long Island, New York, Trump seemingly encouraged police officers to be rough with people they were arresting, per ABC News. "Please don't be too nice," he told the audience.

• August 2017: In the aftermath of the white nationalist rally in Charlottesville, Virginia, Trump failed to unequivocally condemn the violence and said "many sides" were to blame, failing to distinguish between those who participated in the "Unite the Right" rally and those who showed up in opposition to it.

• October 2018: While speaking at a Montana campaign rally, Trump publicly praised Montana's then-Rep. Greg Gianforte (R) — the state's current governor — for previously assaulting a reporter. "Any guy that can do a body slam, he is my type!" Trump said.

• October 2019: A New York Times report outlined various strategies Trump had allegedly deliberated to keep migrants away from the U.S. southern border, including a water-filled trench with snakes or alligators and shooting migrants in the legs to slow them down.

• May 2020: Trump used violent rhetoric when referring to protests in Minneapolis in the wake of George Floyd’s killing, tweeting, "when the looting starts, the shooting starts." The phrase has a racist history going back to police brutality against Black Americans in the 1960s, per the New York Times.

• President Trump said when demonstrators were filling the streets around the White House following the death of George Floyd: "Can't you just shoot them? Just shoot them in the legs or something?"

• June 2020: Trump threatened to use the U.S. military to quell Black Lives Matter protests across the country. "If a city or state refuses to take the actions necessary to defend the life and property of their residents, then I will deploy the United States military and quickly solve the problem for them," Trump said.

• August 2020: Trump expressed interest in sending the National Guard to Portland, Oregon, to confront protesters, per Vox. "We could fix Portland in, I would say, 45 minutes," Trump said.

• September 2020: Trump lauded law enforcement officers for killing Michael Forest Reinoehl, a self-described Antifa member suspected of killing a right-wing activist the previous month. "That’s the way it has to be. There has to be retribution," Vox reported.

• September 2020: When offered the chance to unequivocally condemn white supremacist violence during the first presidential debate, Trump failed to do so, instead telling the far-right Proud Boys that they should "stand back and stand by."

• January 2021: At a rally preceding the Jan. 6 Capitol riot, Trump repeated false claims that the 2020 election had been stolen and told supporters that "we're going to walk down to the Capitol," adding that "you'll never take back our country with weakness."

"A landmark essay from the 1990s called 'Defining Deviancy Down' had disturbing foresight about the consequences of behavior such as Trump’s coarse and hateful speech," wrote D'Antonio. "Published by Sen. Daniel Patrick Moynihan, himself a sociologist, it argued that societies can only police a certain level of deviance. As that resource is exhausted, what was once unacceptable is now tolerated. 'We are,' as the late Moynihan put it, 'getting used to a lot of behavior that is not good for us.' Those words have rarely been truer."