Yes women are just as evil as men are, but men tend to be more aggressive. No women are not always the ones being abused - I have heard of a man being physically abused by his wife and I was very angry at her for being so cruel. But most of the time, it's the women being absued. No, just because someone is cheating on you does not give you any right to kill them, but a lot of people do kill because of that - especially husbands and boyfriends. Some women do murder because they are jealous, but most kill for a reason. If they can get to the police in time to have the man who is abusing them arrested, that's great, but a lot CAN'T. A lot of women are threatened with their lives if they tell.
One woman was in an abusive relationship for eight years. One day her boyfriend got mad thinking she was cheating on him. He was always pretty controlling and such. Anyways, he came home, shot her mother (killed her), and then blew off half his girlfriend's face. Before this had happened, a year or two before, he had told her, "If you ever leave me I'll kill you," and she thought it was cute and he meant it in a loving way. Once she asked him, "What if I leave and you can't find me? And you can't kill me? What will you do then?" and he told her he'd kill her family. This woman was TRAPPED. She was innocent and couldn't get out.