Narcissism & Sociopathy are on the same spectrum ALL Sociopaths are also Narcissists NOT all Narcissists are Sociopaths, though. The spectrum only runs one way.
Not at all
Yes, it is. Many sociopaths are narcissistic by nature (i.e. caring about themselves to an extreme). Munchausen's syndrome is related to narcissism, as it is focused on attention-getting. Most sociopaths do not have Munchausen's, but most people with Munchausen's are probably sociopaths (or at least narcissists).
No not always but they can be.
Not all abusers are narcissists, but all narcissists are abusive. Thats right. Some abusers are BPD. Some are sociopaths. But all abusers have a personality disorder. All are selfish (to a dangerous degree). All lack empathy (when it gets in the way of their selfish desires..and there are innumerous desires, they are never satisfied).
We cannot answer your question because of legal considerations. It is, however, a safe bet that there are a number of narcissists and sociopaths in the national news every day.
Not necessarily; they are not the same thing.
Sociopaths might find other sociopaths interesting, but would soon fall become bored and frustrated. Sociopaths like easy prey to manipulate, as they like to feel everything is below them. So sociopaths might actually try to avoid other sociopaths.
It depends, and without knowing the individual nobody can give you a rock solid guarantee of what they will do. Generally sociopaths and manipulative narcissists are kindred, but in this regard they may not be. Sociopaths are not emotionally attached to anyone or anything but themselves, so if you dump them then they'll probably be moving swiftly on to their next partner/victim. There will be no hard feelings because there never were any feelings. Narcissists may consider your act of dumping them as effrontery and an insult to their (perceived) greatness, possibly they will defame you to others or seek revenge. Whether that revenge is violent or not will depend upon the particular narcissist. The best way to deal with them is to let people who you trust know the circumstances of the break-up, and if you feel it's necessary let the police know. Involving the police is usually enough to keep sociopaths/narcissists at bay-they don't like the idea of prison and losing their liberty and chance to scam people.
No, in fact, it's the opposite. There are many more straight sociopaths than gay ones.
Yes. Sociopaths lack empathy, not the ability to feel sorrow.
In my experience, sociopaths use religion to manipulate others.