I feel like you're bending out of shape to justify the lawless voluntarism of the government. This guy deserved it because he took on the powerful. This on had it coming because he was, allegedly, a foreign agent. That other one was an oligarch, so likely a thief anyway - it's ok to gulag him. In the same vein people would say that a girl had a short skirt, so likely a slut and totally deserved the treatment she got.

What you're doing is rationalizing the crime. People do that because they can't stand the alternative - admission than those in power can and do railroad people's lives because they feel like it, and there is nothing you can do to stop it. The mere thought of it is unbearable, so it's easier to come up with an excuse as to why the victim had it coming, and therefore why this won't happen to me and people I care about. It's called "the just world fallacy" - a mistaken belief that everything happens for a reason, and so nothing needs to be done about it. It's where the fear of doing something meets the excuse for not having to do it.

But here's some good news - you can actually admit that those things are unjust, and you are not obligated to right the wrongs by yourself. It would be nice if you did, but just being honest with yourself is an achievement in its own right.