Take any advice from friends and loved ones with a grain of salt. They say these things because they see you are in great pain. They want to help ease your pain, so they will give advice based on that. Hmmmm...I read that somewhere...
One thing I have always appreciated from my father throughout this whole mess...he always told me, you need to decide what you want to do, and no matter what you decide, I will be behind you 100%. He listens, empathizes, but does not offer any advice as to what I should do.
As everyone has said here, when you do talk to your wife, remain CALM but firm.
If she has another emotional episode of anger and violence, I would only suggest one thing, take the children, leave the house and then call the police if warranted. If you try to make the call with her on the rampage, and waiting for them to show up, it could esclate.