Your question was emotional and I would say childishly at that.
Did France 'suddenly' found 20 targets, as you emotionally put it ? No, the French did not 'suddenly' found these targets. These locations have been either highly suspect or established to be well known IS controlled. Satellite and overflight recon gave us information as to how people behave around and inside these cities and even around buildings. This is called 'signature' reconnaissance.
Everyone have a signature, by that it ranges from your handwriting to how you eat to how you drive, and if you are a computer programmer, your peers can recognize your code without the need for you to document its ownership. Signature reconnaissance is an established science that predates satellites and aircrafts. It is an intelligence tradecraft, as in simple 'spying', starting with the human observer noting human behaviors in group settings.
If you see men in suits carrying briefcases going in/out of a building, that is a signature behavior for what is most likely to be a place of business. The building could be a cover for something else but unless you know or observe other behaviors, the initial impression will be that of a place of business.
If you men in uniform and saluting each other, that is a signature behavior for a military.
If you see a vehicle running with siren and other vehicles getting out of the way, that is a signature behavior for a law that says an emergency response vehicle have priority right-of-way over anyone else.
If we did not bomb these targets, it was not because we did not observe them but because of other considerations, most likely political, that restrained us.
Wrapping your emotionally childish comment in technical mumbo jumbo will not make it any more sensible and rational.
The truth is very simpler than needing your mumbo jumbo explanation. What we are seeing is Afghanistan fiasco all over again. The US and its allies using Wahabis as proxies to achieve geopolitical goals. Then these Frankenstein monsters coming back and biting the hands that fed them. It happened in Afghanistan and now it has happened in Syria.
The moral of the story is: Do not create monsters as long as you are living on the same planet as the monsters.
Because of Childish emotional reasons, US tried to dislodge Assad. This emotionally childish policy has seriously backfired.
And by the way, no amount of aerial bombardment will achieve anything. This war must be fought on the ground. But I do not see any American or French divisions on the ground. The only divisions on the ground are Assad forces. So if France really wants to destroy these animals, it must start supporting Assad's military. As Russia and Iran have been doing. But for this you would need maturity. You would need to set aside the emotionally childish demands that, "Assad must go".
And if we assume France actually targeted IS military positions in Raqqa, a question is raised, what the **** has U.S been doing in past year that France can arrive and suddenly find 20 important targets in the city? One of them are screwing around very badly.
Well, US claims to have provided the intel for the French to vent their anger:
http://www.nytimes.com/2015/11/16/world/europe/obama-g20-turkey.html?_r=0
Of course France as UNSC Veto holding nuclear armed state had to respond somehow but they were powerless so Americans just pulled out a list of fixed buildings for them to go and drop some bombs on. Completely ignoring the fact that these animals do not care about buildings.
Completely lacking is and has been, the strategic sense of what it would mean.
Without ground invasion and staying put on that ground for decades to come will not have any strategic effect. A proper military must roll into Raqqa and hold it forever.
The problem is, the only force capable of doing that is Assad's military allied with Iran and Russia. France and US will have to lose face internationally and swallow big chunks of their pride, changing their ridiculous policy of "Assad must go".