so modus operandi matters. if there were no fighter jets then the arrest was ok, it looks like.
What do you think would happen if Ryanair's pilot refuse to cooperate with Belarus's request?
In both cases it was to detain somebody doing an act of public service on behalf of their country - an act treated as criminal. This is the important part.
Passengers on the Bolivia's flight were at no point in danger. They could have picked another country, Russia or Russia-friendly one to land. Can you say the same with Ryannair's ones? Did they have the choice?