Threatening slogans were sprayed on the walls, red paint was poured over the steps and an axe was left outside his home.
"When a judge in a Swedish court has his home vandalised in this way, it is of course very serious," said Ingvar Paulsson, head of the Gothenburg District Administrative Court, to Göteborgs-Tidningen.
Extremist group Antifascistisk Action (Anti-fascist Action - AFA) writes on its homepage that the attack was motivated by the situation of Iraqi refugees in Sweden. The Swedish Board of Migration has ruled that Iraqi asylum seekers should be deported if they cannot show that a threat exists against them personally. The decision is founded on advice from the Swedish Foreign Ministry that Iraq is not in a state of war.
"Despite the man's elevated position, which we consider makes him particularly guilty in this context, he is far from alone in passing death sentences on the innocent," AFA writes on its homepage.
The vandalism of the man's home is believed to have occurred on Saturday.
"We have been to the scene and investigated," said Henry Thor of Alingsås Police said to Göteborgs-Tidningen. Police are treating the attack as a case of 'violence against a person in authority' or making illegal threats.