On Tuesday, two Jobbik MPs tried to enter the conference, which was held at the British Embassy, but were denied entry, according to organisers.
Péter Krekó, director of the Political Capital think-tank, which organised the event, said: “We are open to debate with them but not in a conference like that because this conference was not about them.
“I think if they came here they could destroy the conference. We should be aware of the sensitivities of the participants.”
Some Hungarians revere Horthy for defending Hungarian territory and believe he saved Jews from being deported.