The bulding was undergoing a renovation.
Old building + hot work = frequent fires.
This is how Notre Dam burned. It's how the old Capitol building in Iowa burned. It's how the Yonkers building burned. If you don't like it, the answer isn't to blame a secret cabal that wants to destroy history. THE ANSWER IS TO STOP IMPORTING FUCKING INCOMPETENT IMMIGRANT CONSTRUCTION WORKERS.
Damn sure is a good thing western governments are trustworthy and never lie.