Adinolfi started as a
Christian Democracy member, but after the party dissolution, he joined the newly created centre-left
Italian People's Party, being the youngest member of their constituent assembly in 1993, aged 22 years old. He was elected national president of the Popular Youth of the party in 1994, joining soon the national executive of the PPI. He founded the movement Direct Democracy to run for mayor of Rome in the administrative elections of 13 May 2001. He supported
Walter Veltroni in the second round of the elections. He was a co-founder of the
Democratic Party, being a candidate for the party leadership on 18 July 2007. He had 5906 votes, entering by his own right the constituent assembly of the party, which elected him for the commission that wrote their statute. He was also a member of the national direction of the PD. He was a candidate of the PD at the legislative elections of 13–14 April 2008, in Lazio circunscrition, at number 18, but wasn't elected. He was a candidate for the national secretary of the PD on 25 June 2009. He became a member of the Italian Chamber of Deputies on 13 June 2012, replacing Pietro Tidei, which he was until 14 March 2013. In 2012, he was one of the first Italian parliamentarians to ask for a diplomatic intervention of Europe in the
Syrian civil war. In March 2016 he founded
The People of the Family, a
social conservative party. The party was accused by many political commentators of being a
Christian fundamentalist movement. Adinolfi became quite famous in Italy for his controversial statement. He created a lot of protests when he stated that women must be submissive to men, as written in the
Holy Bible, and that
Adolf Hitler was less dangerous than people who supported
euthanasia, because he killed
disabled people for free. In May 2017, Adinolfi presented the French President
Emmanuel Macron as a Freemason. In 2014, Adinolfi published the book titled
Voglio la mamma e La Croce with the
Youcanprint publishing house, a book in which he invited the Italian center-left position to take the role of defensors of the weakest persons like newborns (in respect of
abortion,
same-sex marriage and
surrogacy of maternity), the elderlies (
euthanasia). In November 2018, he publicly defended an Italian writer, psychologist and psychiatrist, with 40 years of professional activity, that have affirmed homosexuality is an illness and not a normal condition. The municipality of
Turin supported the judiciary against her. In June 2021, he publicly commented
Black Lives Matter symbolism, shown and practised by volunteering football players during football matches played in
UEFA Euro 2020, as ridiculous. ==Books==