The point is that you said "Molenbeek" is a no-go zone, which is untrue because Molenbeek is basically a city in itself (what people know as "Brussels" is 19 cities/districts called
Communes put together). That's like saying Brooklyn is a no-go zone. As in any district, Molenbeek has rough areas, and not so rough areas. My sister lived there for 10 years with her family, no problem. I have friends who live there right now. I'll take my eyes and my own experience over what a Flemish liberal will say about Brussels.
So you did read that Belgium had a functionning gvt but wrote the opposite

Caretaker gvt had the presidency of the European Council, decided to send Belgium in the Lybia war and was taking care of business at the height of the euro-crisis. People in the opposition (who were taking ages to form the new government) actually complained that the gvt was doing too much

And that was in 2010-2011, totally unrelated to the current terror emergency situation. Plus all the major factors that people are pointing to the cause of areas of Molenbeek being what they are are social and city infrastructure, as well as education, all competencies of local and regional gvts, that were well in place. The 2010-2011 crisis was at the federal level.
Belgium, Brussels Region and Molenbeek Commune have all had major fukk-ups over the years that have lead to this current situation, but that's not a reason to just say whatever.