It is possible for a person with narcissistic traits to engage in manipulative behavior, including gaslighting, in order to maintain control over their main source of supply. Gaslighting is a form of psychological manipulation in which the abuser tries to make the victim doubt their own perceptions, memories, and sanity.
In your scenario, a person with narcissistic traits might try to convince their main supply that they have Borderline Personality Disorder (BPD) as a way to deflect attention away from their own narcissistic behavior. By making their main supply believe they have BPD, they may try to create doubt or confusion in the supply's mind about the nature of the relationship dynamics.
This tactic serves several potential purposes for the narcissist:
Shifts focus: By making the supply believe they have BPD, the narcissist diverts attention away from their own harmful actions and behaviors.
Victim-blaming: It may also be a way for the narcissist to make the supply feel like they are the problem or at fault, further cementing the narcissist's control over the relationship.
Control and power: Gaslighting is a tool used to maintain control over the victim, eroding their self-esteem and independence.
Undermining credibility: By planting the idea that the supply has BPD, the narcissist may make it more challenging for the supply to seek support or validation from others, as they could be seen as less credible.
It's essential to remember that only qualified mental health professionals can diagnose personality disorders or mental health conditions. If someone suspects they have BPD or any other mental health concern, it's crucial for them to seek the help of a professional therapist or psychologist for a proper evaluation and appropriate treatment.
If you or someone you know is dealing with a potentially abusive or manipulative relationship, it's essential to reach out to a trusted friend, family member, or mental health professional for support and guidance.