For over 50 years now France has been corrupting those countries' elites at the expense of more than 90% of the population. For 50 years those countries' cooperation level with each other have been hindered and their industries dilapidated to keep them poor and dependent from Europe or outside aid. Dictators have already been put in place (like how can anyone even stay in power for 25 years with nobody batting an eye despite the country lagging behind in everything?) to pillage the regions economic resources and pollute their soil, especially uranium and other metals.

Do you really think it'd be internationally acceptable to commit a massive genocidal war after what Nazi Germany had done to Jewish Europeans eight decades prior?

Overthrowing the established governments is only going to make matters worse. Just see how much of a mess Libya is right now, 10 years after Gaddafi died. French civil aircrafts still won't even fly over it.