Alleged murderer Anthony Comello (above) is accused of killing Gambino crime family boss Francesco 'Franky Boy' Cali last week

The man charged with killing Gambino family crime boss Francesco ‘Franky Boy’ Cali outside his home on Staten Island last week had a secret Instagram account on which he posted extreme right-wing messages and memes.

Anthony Comello, 24, appeared in court for the first time in Toms River, New Jersey on Monday for an extradition hearing.

During the hearing, he showed off drawings on his hand which read ‘MAGA forever’ and ‘QAnon’ - a far-right conspiracy theory alleging that a ‘deep state’ is working to bring down President Trump.

Those messages are in line with the posts from his Instagram account, the existence of which was first reported by the New York Post.

Comello ‘used to post crazy things about politics and Trump and Democrats,’ a source told the Post.

The Instagram page was created under the handle 'realamericasvoice_'.

One Instagram post included the Reichsadler, or ‘imperial eagle,’ which was used during the Nazi period.

The post reads: ‘Infidel of freedom, infidels of the free world...Dems=demons go down on all counts.’

Another post shows House Speaker Nancy Pelosi wearing a symbol that supposedly represents ‘evil fascism.’

The Instagram page believed to have belonged to Comello was created under the handle 'realamericasvoice_'

The page included extreme messages denouncing illegal immigrants and Democrats. It also included memes claiming there was a conspiracy to bring down President Trump

The above meme found on the Instagram page shows extreme messages denouncing Democratic members of Congress and liberal activist Linda Sarsour

One Instagram post (left) included the Reichsadler, or ‘imperial eagle,’ which was used during the Nazi period. The post reads: ‘Infidel of freedom, infidels of the free world...Dems=demons go down on all counts.’ The post on the right says Nancy Pelosi represents 'evil facism'

There are also truther conspiracy theories which allege that the September 11, 2001 attacks were orchestrated by the Bush administration.

Another Instagram post depicts Michelle Obama, the former first lady, as a man dancing with ‘wife,’ Barack Obama, whose head is photoshopped onto her body.

One meme shows a group of prominent Democrats, including Barack Obama, Bill Clinton, Hillary Clinton, James Comey, Eric Holder, and others in jail for ‘treason’ since ‘Russia collusion is a proven lie.’

The Instagram post also shows messages denouncing illegal immigrants, socialism, and taxes.

Comello first drew the attention of police after he bizarrely tried to make a 'citizen's arrest' of prominent Democratic figures including New York Mayor Bill de Blasio, Pelosi, U.S. House Rep. Adam Schiff, and U.S. House Rep. Maxine Waters.

'There was an incident at the federal courthouse in lower Manhattan where he showed up [on February 21] asking to make a citizen’s arrest of a number of elected officials,' NYPD Deputy Commissioner John Miller told the Post.

'These were rambling statements, but it involved that he wanted to make citizen arrests of Maxine Waters, Congressman Schiff,' Miller said.

Schiff, Waters, and Pelosi are members of Congress from California. They are also outspoken critics of President Trump.

Miller said that Comello 'blamed Nancy Pelosi and all kinds of other people for stealing the election.'

The day after he showed up at the courthouse, Miller said Comello went to Gracie Mansion, the mayor's official residence in Manhattan, in an attempt to arrest de Blasio.

'Based on that incident and the language used there, his description and image, police officers who were assigned to Gracie Mansion recognized him as an individual they encountered the following day, Feb. 22, as somebody who showed up asking to make a citizen’s arrest of the mayor,' Miller said.

Camello (above) showed off pro-Trump slogans on his left hand during a court appearance on Monday in Toms River, New Jersey. The messages include 'MAGA Forever'

Comello asked a US Marshal how he could go about performing a 'citizen's arrest' on House Speaker Nancy Pelosi (left) and turned up outside New York City Hall protesting against Mayor Bill de Blasio (right) and saying he should be jailed

Comello is also said to have tried to make a 'citizen's arrest' of top Congressional Democrats Maxine Waters (left) and Adam Schiff (right)

'They engaged in conversation with him, and while they were waiting for a sector car to show up, he walked off. That was the extent of the contact.'

One source told DailyMail.com: 'He was clearly unhinged well before he decided to kill Cali. The whole citizen's arrest inquiry against Nancy Pelosi is proof of that.'

Gambino crime family boss Francesco 'Franky Boy' Cali (above) was murdered outside his Staten Island home on March 13

While appearing on Monday at a court hearing in Toms River, New Jersey, where he agreed to be extradited to New York, Comello had also scrawled 'United We Stand MAGA' and 'Patriots In Charge', which suggest he was influenced by QAnon - a discredited far-right conspiracy theory that alleges a secret plot by so-called 'deep state' operatives against Trump and his supporters.

Comello's courtroom stunt has already been compared to the actions of 'MAGA Bomber' Cesar Sayoc.

Floridian Sayoc, 56, was charged in October last year with sending 16 pipe bombs to President Trump's political enemies, including Secretary of State Hillary Clinton and former President Barack Obama.

When he was arrested, Sayoc had been living out of a van covered with pro-Trump stickers and images of prominent Democrats with cross-hairs on their faces. Sayoc faces life imprisonment if convicted.

Investigators are seen with forensic equipment outside the Cali's home on Thursday