Azhar Ahmed, wrote on Facebook that "all soldiers should die and go to hell" following the death of six servicemen in Afghanistan. 20-year-old Ahmed, from Ravensthorpe in West Yorkshire said he did not think his comments were offensive.
District Judge Jane Goodwin disagreed, branding his remarks were "derogatory, disrespectful and inflammatory".
He will now do two hundred and forty hours of community service over a two year period and has been fined £300.
More top news
Hull boxer Luke Campbell faces the toughest fight of his career tonight.
More than four thousand people took part in a charity walk in Leeds today to highlight the plight of those affected by dementia
Dozens of people have marched through Lincoln, in protest over plans to close the city's only NHS Walk in Centre.