AFAIK, countries may lawfully deny entry to their airspace. If the outcome is that an aeroplane has to divert its route, well, tough luck. Those countries played their cards.

To be a comparable case two conditions should be met, namely that a) the bomb threat is real, and b) landing in Minsk the most rational decision.

If both a) and b) are real, well, everything was lawfully managed and the blogger just had bad luck. But if they aren't, no it's not the same case at all.