Congolese eagerness to maintain peaceful relations with its neighbors doesn't mean it will accept provocations. The return of the M23 almost a decade after its collapse shows that Rwanda keeps backing the rebels against the DRC.
The DRC is promoting dangerous anti-Rwanda speech in an attempt to drag Rwanda into a domestic conflict. The international community has a duty to speak out against this and prevent a reedition of the 1994 Genocide against the Tutsis.