Notice the line about Col. Beckwith modeling Delta Force on the “Famous S.A.S” — did the author ever realize that the fact that British SAS is indeed famous blows his entire argument?
This information might be a little bit dated but DELTA was initially formed for a specific purpose — hostage rescue. They were focused on anti-terror. It is therefore a relatively small unit of hand picked Special Forces operators. Comparing DELTA to the SEAL Team 6 (DEVGRU) is more accurate than comparing them to the SEALs in general.
Nope. *Blue Light* was formed for hostage rescue, particularly in the aircraft-full-of-hostages days. Delta came along a year or two later.
The SAS, btw, was formed to destroy aircraft...German ones.