Defense Minister Kristóf Szalay-Bobrovniczky said the former chief of staff who was sacked before joining the opposition Tisza Party "poses a danger to Hungarians".
The defense minister said that based on audio recordings provided to Hungary by NATO, it was clear that the former chief of staff had departed from the Hungarian government's standpoint.
In a Facebook post, the minister said he personally informed NATO's Deputy Secretary General that the former Hungarian chief of staff had not represented Hungary's position in NATO, and he also thanked Radmila Sekerinska for the organisation's "constructive cooperation".
In a video published alongside the post, he said warring sides departed from and returned to negotiating tables, "so who says what very much matters".
The former chief of staff had declared "Slava Ukraini", or "glory to Ukraine", "which is unworthy of a soldier and unacceptable", the minister said.
Minister Szalay-Bobrovniczky said it was important to inform NATO about the related investigations taking place in Hungary.