You can easily tell abusers and victims apart because victims report that they have been abused and describe their abusers' behavior as abusive meanwhile abusers paint themselves as victims and accuse their victims of abusing them. If you witness two people fighting online and side with the abuser instead of the victim then you are just as bad as the abuser and you are going to hell forever. If you so much as catch wind of a conflict between two people online and do not immediately speak up to decry the abuser then you are also going to hell forever.
