Liars are Opportunists
This is a report from NBC News on the Notre Dame Cathedral fire by Ben Collins on August 16, 2019:
"Images and videos of the flaming cathedral spread quickly across social media and were quickly seized upon to push Islamophobic narratives that have flourished in far-right politics around the world in recent years. Those sentiments then made their way to more mainstream conservative pundits, who questioned whether the fire had been set on purpose.
Some anonymous users used editing software to push conspiracy theories on YouTube and Twitter, and their accounts remained active on the platforms -- despite repeated debunkings and reports on the platform. One video on YouTube, viewed 40,000 times, superimposes audio of a man yelling “Allahu Akbar” (Arabic for "God is great") over a video of the Notre Dame fire. The audio comes from a years-old video, which is the first result when a user searches for “Allahu Akbar Scream” in Google. The video has not been removed from YouTube."