Apparently unlike you, I have faith that we are in a society. And in a society, we do NOT murder people and generally do not advocate for murder and extra-judicial killing.
You have a lot more remorse for violent offenders, and those who take advantage of women, children, or other weaker (than themselves) targets. You also have a lot more faith in our very fine liberal lawmakers who would love to see this "man" free because he "got his heart broken".
Just because you, or those like you, don't like something does not give you/them the right or justification to "take the law into your own hands". A core concept in this country is that if you don't like the law, you can work to change it. So perhaps you should see what happens in this case, and should you not see what you think is fair then you could become an advocate for changing the laws, or run for office yourself. If enough people agree with you the law will change or you'll get voted into take the place of "our very fine liberal lawmakers".
In the meantime, you want to know a big reason WHY the second amendment is under attack? Because the 2A community that claims to believe in law and order is also in places like right here on the PUBLIC forum appearing to wish for murder. Imagine people outside looking in and seeing armed people wishing for resolution such as you suggest. No wonder why folks would advocate to disarm us.