Why Didn't Fighter Jets Intercept Commercial Aircraft?

One theory is that the high jackers were trained pilots, and they simply turned off the planes transponders. The last time it was done, in 19 79, it took an hour and 19 minutes before they were able to successfully intercept and lead the plane down. They also state that intercepting a commercial plane takes longer than it does in the movies. And i know you have more theories, but your giving like sound that are very legit. I want to just give one that is superwonke serti remember that was actually the first one that i ever heard, which is that it's actually all orchestrated by the jews those because not a single drew died during nine 11