Earlier quoted context omitted.
Not this commenter, but how I've often heard it expressed was we created the justice system as a better, more civilized alternative to putting people in holes just outside of town. At such a time the justice system stops working, as it increasingly seems to have RE: the rich, then we resume holes.
This entire line of thinking just seems to be essentially advocacy for a return to that exact system. "Do what we want or we'll go back to random murder". I wonder if the original commenter would have put the same comment if the article were "man shoots his wife and her lover on discovery of adultery"
Increasingly, though, people in the United States feel that the rich and powerful have become effectively insulated from the legal system, such that the common person is denied any redress. At that point, one no longer feels any reason to continue working within the legal framework, because it seems clear that the framework is not at all "equal" under the law.
Hence, when all other options feel exhausted: murder.
And, frankly, I imagine this will only continue with time, unless this country decides to actually provide some mechanism to hold people in power accountable. Like, I'm frankly surprised no one has attempted to assassinate members of the SCOTUS yet recently, given that they enjoy a lifetime appointment to make wide-impacting, scrutiny-free decisions.