No, not at all.

Soldiers work as part of a team, which is part of a larger team. You can't count on a psychopath to care about the team or the larger organization.

What (should) motivate a solider to kill is the same emotion as a sheep dog protecting the flock, or a mother bear protecting her cubs.

What motivates a psychopath to kill is harder to say, but it is not something which is generally recognized as morally good.