How many of the other ones were under a massive renovation??am suspicious of the fire simply because there have been over 400 church fires in France over the past year and apparently there were no workmen on the site that day. However, it could be an accident too so we'll simply have to wait until the investigation is over. Hopefully, there will be no political interference in said investigation and we will know exactly how it happened.
If the workers had been there the odds are they would have stopped the fire before it became a blaze. When flammable material is present should there be fire suppression devices to 'handle a fire', such as temporary sprinkler systems. Perhaps a robbery was taking place and the distraction got out of hand as it was 1/2 hour after the alarm sounded that the firemen found the fire.
'You will be told what they want you to believe', that has a wide gap before it contains any truth these days. The 'change' is it is not even being challenged anymore, 'Oh.' and the topic is replaced by one of much lesser importance.
Why are you waiting for somebody to fill in the blanks you already seem to have. Most stories are old within a week so if you look around during that time you will get all the variances and 'a little bit here' and 'a little bit there' will leave you with your questions and some answers as well as a few new questions that will lean one way or the other as far as 'being most likely the facts in the matter'.