The article clearly states that it was pushed by the Interior Ministry. Those in there know exactly what they are doing.

On the other hand, the interior minister himself has no clue, as well as all the politicians in the assemblée. This is where the double-bluff is from. (granted, I think Darmanain was an exception)

We have to remember that, while the minister changes with the government and thus is by definition a politician (seriously, look at some of our ministries, they go from education to health taking a trip by ecology with a pit stop in finance), the ministries themselves are made of people that mostly stay in place and are not affected by government changes. Those are the ones making the calls. And those precisely know what they're doing (thing DGSI and DGSE).