Prof Nigel Eastman, a forensic psychiatrist, told the court that accused Kiaran Stapleton had a "very substantial lack of ability to feel what other people feel."
Stapleton, who called himself 'Psycho' Stapleton at an earlier court hearing, has pleaded to manslaughter not amounting to murder, on the grounds of diminished responsibility.
Bidve's parents from Pune are attending the ongoing trial. Bidve was killed on December 26 last year in Salford.
Eastman said "I don't think he has got any real feeling for what he's done, he's sorry for his own situation rather than the victim's."
He noted that Stapleton did not describe being frightened or upset after the shooting, while his friend, eyewitness Ryan Holden, was badly shaken.
He said of Stapleton "I don't think it's because he's the harder of the two men, it's because he doesn't feel."
Eastman also described how Stapleton said how he felt a 'glass wall' between himself and other people when acting violently.
Stapleton told the psychiatrist "If I'm going to do something, nothing will stop me. Even if there's a camera there or the police.
Once I'm on one side of the glass wall I can't get back. Nothing will stop me doing what I'm going to do."
Eastman told the court "I have seen no evidence of any real understanding of the emotional significance of what he's done.
In the criminal world there's nothing so worrying as the nutter.
Ordinary people you can cope with, you know how they react. Someone who doesn't seem normal is worrying because they are unpredictable."
"To most people it would seem just very odd to go up to someone, a stranger, and shoot them. I think what he's demonstrating is his very substantial lack of ability to feel what other people feel.
I don't think he has any real feeling for what he's done," the psychiatrist said at the trial.
London: A Briton facing trial for killing Indian student Anuj Bidve told a psychiatrist after his arrest "If I said I was sorry, I would be telling a lie," the Manchester Crown Court has been informed.
First Published: Thursday, July 12, 2012, 21:04