That dudes ineptitude would only have caused his own flat to burn out, it would not have caused the whole building to go up in flames, had proper sprinklers been installed/working, smoke alarms, etc.. add to this, the highly combustible cladding..
Those are the key factors (IMO) that led to the tragedy/loss of life.
There ya go... I don't automatically agree with Thai3 (or anyone for that matter) although I still agree with him wholeheartedly on the excessive immigration issue, which is separate from this terrible incident.