The main question is which political party ordered the attack: Vlaams Belang, as this party is convinced that the concerts are held to influence the outcome of the municipal elections; or the other parties, as the outcome indeed may be influenced if Vlaams Belang will be found guilty.
The main inquiry is whether Vlaams Belang, believing the concerts are meant to sway the election results, ordered the attack, or if another party did so, given that the outcome could be affected by a conviction of Vlaams Belang.