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
Sheffield Wednesday blogger Terry Hibberd reflects on defeat in the playoff final against Hull City.
World champion Lee Selby has vowed never to fight Josh Warrington after he turned down the chance to fight so close to his August wedding.
A 27-year-old man has been found guilty of raping and robbing a number of women in Doncaster in 2014.