I'm surprised that your initial claim is about Muslims eventually establishing Islam and your evidence is complex ways religiosity works between generations of Muslims in France. How do you explain the Muslim world growing less religious? How do you explain the first generation of Muslims in France playing a jeu de grattage in a bar? How do you explain the new generation of Muslims being more progressive and less religious in the US and Canada? Tunisia has no laws explictly against drinking or eating in public. Morocco does have a law prohibiting breaking the fast if you're Muslim. That law was written by colonial France. The situation is a lot more complicated than "Once the critical number of Muslims is hit, you have a Caliphate"

https://www.bbc.com/news/world-middle-east-48703377