Dijsselbloem refuses to retract the comment that southern European countries “spent all their money on drinks and women and then asked for help.”
The Greek militant group, Conspiracy Cells of Fire, claimed responsibility for the German attack.
The move follows rising concern about the recent activities of some Brussels-based lobbyists who are looking to influence legislation.
Some local German authorities have decided to block appearances by Turkish ministers.
Some eurozone leaders back the idea of letting some member states push ahead with further integration without the whole bloc following suit.
European Council President Donald Tusk will present the draft Brexit guidelines to the remaining 27 states of the bloc within 48 hours.
European Commission President Jean-Claude Juncker is not worried about other EU countries leaving the bloc.
Martin Schulz, already credited with giving his ailing party a strong shot in the arm, will be anointed the leader of the Social Democratic Party (SPD).