The Birmingham Crown Court heard how Edward Griffiths sent people footage of the attacks at Al Noor Mosque and Linwood Islamic Centre and said he would "like" to go on a killing spree, BBC News reported.
The 44-year-old from Whitwick, Leicestershire, was found guilty of encouraging terrorism and two counts of dissemination of a terrorist publication in May.
He was jailed last week for four and a half years, reported BBC News.
The court heard how Griffiths posted an image of the terrorist, who killed 51 people at the two mosques, which depicted him as a Christian saint and called him a "hero".
Police counter-terrorism officers arrested Griffiths during a raid of his home, BBC News reported.
Judge Paul Farrer told the court Griffiths, who committed the offences between November 2021 and June 2022, was a "sad and lonely" man.
Judge Farrer said Griffiths had a drug problem at the time of the offences.
