Crow, you're overestimating the awareness of Poland. For 98% of Poles, this is eye opening. Most experts who give lectures alongside Bartosiak don't understand or downplay him. And those are experts - nevermind politicians! Politicians believe in alliances, in NATO, in UE. They think US - which is a naval power without a meaningful land army - will ride in and save Poland. Even many US warships can't navigate the Baltic Sea. And if they could, according to him US needs Russia to take on China. US would be prepared to sacrifice a relatively insignificant country if it means their bombers can fly into China from northwest.
Bartosiak rightly points out that there is no "West" anymore, it's just a facade and everyone is caring only about his own business. UE is conflicted.
Bartosiak isn't even advocating a pan-slavic union, or an alliance with Grupa Wyszechradzka (Czech Republic, Hungary, Slovakia). He claims Czechs and Hungary are simply too far south to care about the threat of Russian expansion. Poland is on the crossroads between Europe and Asia, not Hungary. Hungary can afford to make deals with Putin, because they aren't facing a threat of invasion. Bartosiak says that from geopolitics point of view, Poland doesn't have common interests with Serbia, Slovakia, Czech Republic or Hungary. Instead, he suggests Ukraine, Belorus, Sweden, Germany, even Turkey. Yes, Sweden and Nordic/Scandinavian countries in general - notice that Sweden is much more open to joining NATO now that it feels threatened by Russia. And Poland shares the Baltic sea with Sweden, which does wonders for trade.
Sharing a language family with Russia/CCCP didn't stop them from attacking Slavic countries directly, or with NKWD. Coming from the same language family didn't make Poland especially friendly to Lithuania, Ukraine, Belorus, Russia, Czech Republic. Poland waged wars with every single last of them, and quite recently. Frankly, I don't know why you have so much sympathy for Poland - you wouldn't if the country bordered with Serbia. If you check statistics, you will see Poland is disliked by most of its neighbors. I wish it wasn't the case. Germany is, ironically, the friendliest now.
If you look at a map you will see south is the most inconvenient direction for Poland. East and West are easy, there are even rivers from Baltic to Black Sea for very cheap water transport. North is Baltic. Meanwhile those Tatra mountains on the south are only good as a natural barrier. Politicians mostly heard about Free City Gdańsk and how profitable water transport was in past ages. But they can't make a connection with European Union being eager to sponsor the E-40 waterway, Belorus and Ukraine falling over themselves to make a deal with Poland (effectively no one from Polish government attended last year, while Belorus and Ukraine had international experts). They have no clue about the upcoming Silk Road.
The Swedes have a term "Polish parliament" which describes a lot of noise and arguments and very little conclusions. Polish politicians are obsessed with two things: 1) getting taxpayers' money, 2) politicians.
Aside from 2-3 parties, only one of each came into Sejm this year, they don't talk abou things to do, only about names of other politicians.
Ah, yes. Lech Kaczyński spoke in defense of Sebia. That's your reason.
Then again, people may just ignore a great mind like Jacek Bartosiak because in one of interviews he says he has many friends in Israel. This suggests he's a Jew, and Poles are quite antisemitic. And Poles have been known to ignore other great minds like Jerzy Urban, who might be an immoral commie Jew (he calls himself worse things!), but has done Poland great service as an editor of the weekly paper "NIE". No other newspaper comes close in terms of the number of detected frauds, corruption schemes, and pedofiles in cassocks. Most people bash him mindlessly (especially on youtube), they don't even criticize what he says because they can't follow.
If that happens, Poland is more likely to try
the oldschool, Jagiełło-style Intermarium. I doubt it would work. Alliances like that work for strong countries, and Poland is not currently an European power. What works for Germany wouldn't probably work for Poland. Lithuania, Belorus, Czech Republic have small armies and like it that way, they're scrared to do something that might offend Russia.