It's also possible that it was some crazy person who did it.
According to
this article, nope. "Some crazy person" could not pull it off.
The logistics of carrying out the killing on a narrow and busy bridge where it is "very difficult to be unnoticed either in a car or even on foot" and where it is extremely difficult to ensure that the escape car is able to reach the scene at the precise moment it is needed indicate to Soldatov considerable planning and coordination.
The minuscule benefits he gets from Nemtzov not releasing whatever information he had and not talking about economy
You "forgot" about terrorizing opposition just before march and current Kreml elite. More below.
And you would think any part of the Russian government gives a shit about international reputation because...?
Because more sanctions?
I don't see anyone calling for more sanctions just for this killing. You are making things up.
Also, lots of people in the government store funds outside of Russia, and as Qaddafi case shown us, these assets can be frozen if your international reputation is bad enough.
And what exactly that goverment elite can do? Putin just shown them what can happen to someone that opposes him. Choice of Nemtsov in this context matters, because he had once very high position in Russian goverment.
BTW Putin decided his international reputation does not matter the second he annexed Crimea. I find any "but but Putin/Russia international reputation" argument a little...
unconvincing.