Post-'89 Polish foreign policy always openly supported any attempts of any eastern european or post-soviet state to democratize and westernize. In the case of Belarus this also included things such as polish public TV operating a TV channel airing in Belarussian and Russian.
en.wikipedia.org/wiki/Belsat_TV
Kicking as many states out of Russian orbit is geopolitically in Poland's interest. Of course it also just so happens Belarus shares a border and is in close military ties with Russia, which adds further reason for Poland to support a change in status quo on Belarus, even if it is fabulously optimistic to think Belarus will happily switch sides away from being a Russian staging ground (Crimea showed the problem with that).
There's also historical baggage similar to Ukraine (polish minority, parts were former polish land in ancient history etc.), but that's usually just a smokescreen for the plebeians. There's also a Belorussian minority in Poland. So the usual eastern european mess.
en.wikipedia.org/wiki/Belsat_TV
Kicking as many states out of Russian orbit is geopolitically in Poland's interest. Of course it also just so happens Belarus shares a border and is in close military ties with Russia, which adds further reason for Poland to support a change in status quo on Belarus, even if it is fabulously optimistic to think Belarus will happily switch sides away from being a Russian staging ground (Crimea showed the problem with that).
There's also historical baggage similar to Ukraine (polish minority, parts were former polish land in ancient history etc.), but that's usually just a smokescreen for the plebeians. There's also a Belorussian minority in Poland. So the usual eastern european mess.