I'd say the advice to LW2 was acceptable if she didn't have a child; it might be acceptable to continue the relationship conditional on anger management and therapy then. But there is no excuse for this woman exposing her child to this toxicity and horrible example. Also, this isn't a fundamentally good guy who has trouble controlling his temper; this is a guy who enjoys using threats to keep his fiancee in line, and his "someone is going to get hit" comment exposes him as a cruel, manipulative thug. I can't see how anger management therapy is going to open his eyes about his behavior if it is deliberately chosen behavior. This woman needs to end the relationship immediately, after taking whatever steps are necessary to make sure she can do it safely.

This woman needs to think about how much she'll enjoy 50 years of her boyfriend acting that way to her. In front of her daughter. This is not "disrespect." This is abuse and she is permitting it. It takes a lot of work and change to get someone to stop staying "someone is going to get hit" and mean it. She needs to know that one of these days someone is going to get hit and it'll be her.

LW#2 needs to run as fast as she can. This man is abusive. Wait till you marry him, he will harm you physically. And b/c you have a little one you need to leave this man quickly. You don't need this man in your life. Take your time & find a nice guy, because this is not the one .
At this rate by the time you get married he will have you believing it is your fault and you'll have an even harder time removing your self from the situation. You go girl & be smart!!