LOL, yeah "oh, that wasn't a real site, we built a fake one to provoke an attack so we could watch it! Yeah! I built it with my wife, Morgan Fairchild, whom I've seen naked, that's the ticket!"
The US did the same thing at Pearl Harbor. We wanted to witness the tactics of the IJN first hand, so we sacrificed thousands of armed forces personnel and ships and planes to get to SEE IT first hand. Once we knew what they were capable of, THEN we declared war on them (after they fell for the "sneak attack us" ruse!) and kicked their asses in a brief 4 year war that only saw the death of thousands more and the loss of countless more ships and planes.
Anyway, it's widely believed this was enabled by a cyber attack against the networked SAM system, nothing as pedestrian as simple jamming. The Syrians didn't respond because they didn't know they were there. You don't need stealth if you can hack their air defense picture, only jets in the air would've seen them and without prior warning they wouldn't have any up at that time.
The fact that this story just tosses it in as an afterthought kind of validates that.