What Belgium regrets is their inability to bring Rwanda into submission, despite countless threats and sanctions.
This is not the result of a disagreement, it is the consequences of decades of protecting genocidaires, promoting genocide deniers to political position, constant diplomatic sabotage, all in the continuous quest to return Rwanda to 30 years ago.
It is not dialogue you seek, it is obedience. The kind you are getting from DRC, whose people you claim to speak for, while exploiting them for the last century.
In the words of President Kagame:
We ask you: “Who are you? Who put you in charge of us? With the limited means we have, we will stand up to you. After all these years we have spent fighting to build our country, we want to be Rwandans, we do not want to be Belgians.”