The Walloons (and particularly the Francophones in Brussels) don't care about being Walloon/Francophone, they care about being Belgian. The catch being that "Belgian" in their book means Francophone pretty much per definition (which isn't entirely as insulting as it might seem, considering that until less than a century ago, most of the Flemish elite thought the same thing). Wallonian separatism and rattachism (from "rattacher", in casu to France, even though it's kind of hard to see how Wallonia was ever attached to France in the first place) are both fringe movements, they all want to keep Belgium, but they don't seem to grasp that that would logically mean allowing the Flemish to pull their weight, and accepting that Belgium has a Dutch-language majority.

Still, the escalation of things in recent years have sparked something of a resurgence of pro-Belgian sentiment in the silent majority in Flanders, while it has convinced some on the Francophone side of the necessity of making efforts to show interest in Flanders, primarily through learning Dutch.