I have been re-watching the last few episodes of BC, especially the section where Tseng, Reno and Rude rescue Veld, and I was struck by a couple of things I hadn't previously noticed.
The first one is kind of silly. Right after Tseng busts Veld out of prison, Shotgun calls him to let him know that Fuhito has all the materia. She has returned to the Shinra building and is planning to steal a helicopter. After she hangs up on him, she fights her way up to the helipad, takes the chopper, chases Fuhito's truck down the highway, crashes, fights some Ravens, watches Fuhito extract Zirconiade from Elfe's body, and recoveres Elfe. She then calls Tseng to let him know what has happened. Cut to Tseng - and we see that he, Veld, Reno and Rude have not moved from the spot where we last saw them, although at least an hour must have passed!!
The second thing is a bit more meaningful. On their way to rescue Veld from his cell in Midgar's Central Waste Management Facility, Tseng, Reno and Rude encounter about a score of Mighty Grunts. They defeat them with relative ease, bu punching, shooting, or electric shock - at one point, Reno appears to head-butt two of them simultaneously! - and the Mighty Grunts fall and disappear. At no point do the Mighty Grunts speak.
But when our heroes have defeated the MGs, they enter a screen contained three Shin-Ra infantrymen. These guys speak to each other and start shooting. The Turks don't try to fight back; they run. Rude and Tseng run right through the hail of bullets and past the soldiers. Reno comes nose to nose with one for a moment, stares him in the face, and then runs on, while the soldier fires a parting shot. The soldiers are not defeated, or even injured, but they don't give chase, and the Turks run on until they find Veld's door.
Could it be that the Turks have no qualms about taking out the Mighty Grunts because they know the Mighty Grunts are not human, but they refrain from attacking the soldiers because they want to avoid hurting people, especially their fellow Shinra workers?