Murder is an interesting example, because like corruption, people overlook it when "their side" does it. Governments employ soldiers to do it on demand. Gang members and mafiosos use it as a tool. Sometimes people even celebrate it, such as equating body count with success in war.
The problem in politics is that everyone seems to choose a side, then apply that same kind of double standard. Rules for thee and not for me, as it were.
Edit: but of course, "war is the continuation of politics by other means." So it makes sense that the behavior would be similar.
> Warfare is entirely different.
Not so much. A lot of people are already talking about civil war. If political differences escalate to that point, how many will mourn the loss of lives from "the other side"?