A 'socially awkward' man posted vile messages on a Russian social media site calling for the murder of black people, Jews and Muslims as well as the torching of mosques.
Luke Crompton, from Tyldesley, Wigan, also posted messages expressing hate towards gay people on the Russian website VKontakte (VK), which is similar to Facebook.
Manchester Crown Court heard that Crompton, 30, has been diagnosed with autism and was described as an 'extremely vulnerable person'.
His lawyers said that Crompton, who has no friends and only sees his parents and his doctor, did not intend for people to commit these acts.
He admitted that he was 'reckless' and he should have known that by posting the 'deeply offensive' messages that others may act upon them.
Crompton, described as 'lonely', was said to have been targeted online by more sophisticated criminals who pretended to be interested in him but later 'threatened and belittled him'.
A judge spared Crompton jail after saying it was a 'wholly exceptional case'.
Judge Patrick Field QC said that counter terrorism officers had said that Crompton was not the 'normal type of offender' they encounter.
Prosecuting, Alaric Bassano said that the posts by Crompton were publicly available and viewed by thousands of people.
"The posts went beyond merely insulting, abusing or offending," Mr Bassano said.
"Embroidered with words and symbols proclaiming the supremacy of the white race, many of the posts called for and encouraged extreme activity against such people, such as the destruction of the Jewish and Islamic faiths, the torching of mosques and the murder of black people, Muslims and Jews."
His posting was 'sustained and prolific', with hundreds of messages being posted over a nine month period in 2018.
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After one account was suspended, he created a new one in which he said he had been banned previously because of a 'n***** lover'.
Police were told about the posts made by Crompton, which were made in his own name and his profile included pictures of himself.
He was arrested at his home on Brindle Street in Tyldesley on September 19, 2018, and two mobile phones belonging to him were seized which contained material corresponding to his activity on the VK website.
Despite his mental health problems, Crompton had a good working knowledge of computers and social media, as well as Google translate, prosecutors said.
Crompton, who has no previous convictions, denies he is racist or homophobic.
His barrister, David Bentley QC, said: "Although you appear to be dealing with a 30-year-old man with no previous convictions, you are in fact dealing with someone who is functioning effectively as a 10-year-old."
He said that Crompton suffers from social awkwardness and finds it difficult to relate to people and make friends.
Mr Bentley said that Crompton would be 'very easily preyed upon in prison' and said that the public would be served by his rehabilitation in the community.
Sentencing, Judge Field agreed and said it was an 'exceptional' case where he could pass a two-year community order.
The order will include 30 rehabilitation activity requirement days.
"For a number of reasons I regard this case as a wholly exceptional case," the judge said.
"What you did was to post vile and hateful material on a Russian social media site over a period of about nine months in 2018.
"The individual posts were deeply offensive, dripping with hate.
"It is accepted by the prosecution that you didn't post this material with the intent that people would do those things, but you were reckless."
It is 'highly likely' that Crompton's behaviour was influenced by his mental health problems, the judge said.
Crompton pleaded guilty to the reckless encouragement of terrorism, an offence under the Terrorism Act.