You right Poland is polarized on this issue. Whoever isn't with pro-ukrainian narration is automatically 'russian agent' - somethimes it's even funy becouse this refers persons who are anti-soviet, anti russia... Nevertheless I am anti maydan from the beginning, I am rather pro-russia than pro-ukie becouse of culture issue.
Fighting Poles on both side is marginally issue, for Kiev forces fighting mostly special forces, but it's an assumptions until there's be proof of it, for New russia fights only volunteers.
We'll see who's there. I also heard about some foreign forces, but for now there's no proof of this. The fact is, their situation is hopeless, only some political agrements can save them, Novorussia militia don't forget them shelling Donetsk all along..
I understand .west ukrainians did mass genocide of 200,000 poles in East poland volyhia.