Majid and Kalinin are two completely different person.
Majid was an Afghan whereas Kalinin was an officer in the spetsnaz during the Afghan war. Sousuke has tried to kill Kalinin and has been captured thats the reason why Sousuke know that Kalinin is hard to kill.
The eye of the "saint" for Gauron was the eye of a cold blood killer someone who don't give a damn about people dying, who do his job without any kind of remorse, and the traumatic shock who has make him lost the eye of a "Saint" was Chidori Kaname
.