Or we could just overthrow all their governments and make them vassal states. Sounds crazy? Well just take another good look at Saudi Arabia, crazier things happened in name of energy stability. If the choice is between unlimited renewable energy for Europe and sovereignty of the Sahara I know where I stand
You really think it'd be that easy? Europeans, especially France and the UK backed off from that part of Africa mostly because they don't want massive uncontrolled immigration.
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.
Easy? No. Also highly unlikely and against every treaty etc. But bigger wars have been fought over energy security, so not entirely impossible. And with Russia, China and USA fighting injust wars left and right, it seems Europe is the only major power that still cares a bit about internationally acceptable.