I have to say, that wouldn't be the usual angle of a hoax but i've seen it happen so many times i always have skepticism. But we'll wait and see how it turns out, hopefully.
It just happened two days ago. So yeah... Since we're on the topic, look into number of attacks on catholic churches in France. Say, 2016-present time frame.
I know there were 12 of various severity in one week in February, not sure how many were Catholic tho. If it had been that many mosques or synagogues, it'd be reported more widely.
In principle, although in Arabic, like in Hebrew, especially with regional/dialectical variations, vowel transcription to other languages is sometimes an arbitrary call, hence even the Mu-/Mo- variations.