"Why is it almost always men who do this?" Because it's almost always men who commit violent criminal acts.
My sympathy is with his wife and children.
Highly likely he was controlling and violent before this. Possibly pre-meditated too. Mother's Day on Sunday.
"and should have professional intervention." What do you mean by this? Because therapy doesn't work. My dad is abusive. He's been treated for mental illness, stopped drinking etc - still just as nasty. Big reason my mum didn't leave was because he told her he would find us and kill us all. I don't doubt he would have.
While we still blame women for staying, for not reporting, for "provoking" these men it won't change.
I also find the court system re contact after divorce/separation where DV is involved shockingly bad. "He never hit the kids so he still gets unsupervised contact" never mind he battered, strangled, punched, set alight to, verbally and emotionally abused their mother in front of or at best in the hearing of the children.
I know of a case where the father served prison time for attempted murder of the mother - while the DC were present - still got unsupervised contact when he got out.
"No one seems to know them or seen them in the area." Yes new to the area apparently - I wonder if that was due to his being too well known to authorities in their previous home?
Mycatsapirate - thank you for sharing that. I know you weren't asking for sympathy but I'm sorry you went through that.
What needs to change? How we (as a society) raise our children. That it's not ok to BE violent and it's ok NOT to want to be a victim. Grass roots level. That boy pulling girls pigtails on the playground? Needs to be stopped and told it's wrong to do. The girl needs to be told it's ok to tell him to stop, to tell on him. And DEFINITELY no "aww he likes you" crap!