In fairness, Newsweek is suggesting that. B, is merely leading us to the article and wondering if there is an element of truth to it
Well, I'd say that without the ongoing story of churches being targeted in France your "huge probaility that it is an accident, with a small chance it was arson" would be the sensible conclusion, but when you add in the knowledge that recently this stuff keeps happeneing, surely your view changes a little? I mean "huge probability" versus "small chance"? Really?
I would think the fact that it was undergoing renovation at the time would certainly add to the likelihood that it was an accident.
Not sure why anyone would assume it was an act of terrorism and laugh at any alternatives. Leaving it open as a possibility, certainly.