Notre-Dame was one of the most important jewels of all human history. It started the “gothic” architecture revolution, that was, from 12th to 15th century called “francigenum opus” (“French art”) before being called “gothic” by the Italians. It’s the epitome of Western civilization and christian art. The framing of the roof, which was one of the biggest masterpieces of human carpentry, is permanently destroyed. The stained glasses (biggest and most ancient rose windows in Europe) are probably saved.
In 2016, 2 veiled Muslim women tried to detonate a car filled with explosives in front of Notre-Dame (https://en.wikipedia.org/wiki/Notre_Dame_Cathedral_bombing_attempt).
At the beginning of March, an illegal Muslim immigrant tried to burn down the Saint-Sulpice church (http://www.leparisien.fr/paris-75/paris-l-incendie-a-l-eglise-saint-sulpice-n-etait-pas-accidentel-18-03-2019-8034678.php).
At mid-March, an illegal Muslim immigrant tried to burn down the organ of the Saint-Denis basilica (another jewel) and destroyed stained glass (http://www.leparisien.fr/paris-75/paris-l-incendie-a-l-eglise-saint-sulpice-n-etait-pas-accidentel-18-03-2019-8034678.php).
On Twitter, thousands of Muslims are rejoycing and saying that they are happy that Notre-Dame was destroyed ! (http://www.fdesouche.com/1192185-sur-les-reseaux-sociaux-des-musulmans-lient-lincendie-de-notre-dame-au-tweet-blasphematoire-du-jeune-hugo-la-veille)
And when our churches, our cathedrals, our cemetaries, our monuments, are destroyed by Muslim immigrants, Macron uses our policemen to protect… the mosques !!! (https://www.europe1.fr/societe/la-surveillance-des-lieux-de-culte-renforcee-en-france-apres-lattaque-de-mosquees-en-nouvelle-zelande-3874364)