Why does a cop have to enter the property if there is no visible crime being committed or no cries for help? There is none because for all we know it may have been a crank call.
And as far as women being brutalized and killed, you make it sound like it was the killing fields before these DV laws were passed. It wasn’t any worse than it is now (actually it might have been a little better because throwing certain types of guys in jail means that they will be coming after you once they get out). Feminist propaganda has convinced people that they need cops to bust down the door and arrest any guy within sight. Great, now you have jails full of guys that shouldn’t be there, now what? Will they are now “violent” offenders so we can’t let them out. So who gets pushed out to make room for them? Why the car thieves and other petty criminals that will rob you blind while you’re at work! That’s who!
There is no fine line, our rights are being violated in the name of protecting “poor innocent women” who probably had just as much to do with the fight as the guy did (statistically speaking women are just as likely to commit DV as men, only it the men who go to jail, not the women).