I'm going to go with this is breaking news to you but in the time the US had him in custody they failed to laern what had turned him into ISIS material, this after they had him for several years after the gloves came off.
Whose jets were they, if they were Syrian with Russian intel then it is a blow to the US grooming ISIS to be the new Dictators in the area. The place where every Dictator that is yours is a good one, no matter what the locals think..
There was also an Iranian General killed in Syria lately and I have no idea what his specialty was. The last one was a civil engineer.
The replacement will either be stronger or weaker. Stronger means NATO will push for that 350 mile wide 'buffer zone in eastern Syria' to run lines through and arms if the north is in their gun-sight. Syria under Assad would still have to let the lines go through if Europe needs the product as Russia is sending a lot towards China. The price is the same, who gets the money should be somewhat different as Industrial businesses have never been know to spend a dime if it could go to the shareholders instead.
200M university grads that are Muslims are a bigger threat to the industrial way of life than any jihadi.guy wearing a mask in public while claiming that making a woman do it is a sign that she is dominated or some other false Christian fantasy.