A Liverpool fan posted a picture of his tattooed backside celebrating the Munich air disaster, in which eight Manchester United players were killed.
Liverpool lost 2-1 to United in the Premier League at the weekend and the sick supporter said "my hatred got the better of me last night" before posting the picture on Twitter.
The user, known on Twitter as @paul_LFC5, has since deleted his profile on the site.
Twenty-three were killed in the 1958 tragedy, as a critically ill Matt Busby was read his last rites twice when in hospital.
However 10 years later Busby achieved his dream when United became the first English club to win the European Cup.