What kinf of mental illness ?Borderline, schizophrenia or bi polar?

i think it s schizophrenia the person presents serious symptoms:
-she started to be violent
-disappear without discuss with her ex
some months later she reappeared attacking him in
an anonymous forum in internet
-she is being there for months , first hidden only attacking then she was exposed
-she attacked him trying to destroy him: talking about his apparence, masculity, sexuality, family saying very terrible things very evil;
-first she used to listen to him about God now she thinks he s a false prophet and a false christian and she s there to save him from the hell.
-lying all the time
-saying slangs
-she thinks all the things that the ex write in the net is for her
-in the anonymous forum she thinks the ex s talking to her even it s not true
- do not want to discuss only to attack
- very violent behavior
- she trying to invert the stalking she s doing saying that the ex is stalking her
-started to try to ignore after all that saying:you are the worst thing that happ

opening and closing many fakes profiles to be easy to stalk . trying to know everything about ex life but in silence
- saying many times that she will erase the profile but allways coming back

She sounds very paranoid. Swearing has nothing to do with abnormal psychology, but violence and hostility does. This could well be schizophrenia, but it could be schizoid or schizoaffective as well.

It doesn't sound anything like schizophrenia, schizo affective, or any other disorder in that spectrum. Violence is not common among schizophrenics (I am one and know many). Something like 92% of schizophrenics are non violent. We are more apt to just have a flat affect which is one of the symptoms.Talking trash about someone isn't a symptom either.

None of the symptoms you listed include psychosis as it is clinically defined. That is what schizophrenia is all about. Hearing voices, seeing things that aren't there, smelling smells that aren't there.

Bipolar is alternating periods of excessive euphoria or agitation and depression with or without psychosis. You don't mention any symptoms of that either.