And even if Poles wouldn`t need Serbs
Miloslaw is right; when it comes to politics a Serbian voice is presently non existent in Poland. It is not that Poland wouldn't like to listen, it's just that Serbia doesn't have much to communicate to the ouside world, and to Poland, these days. And if it does, it doesn't get through to us.
Kashubi, Silesiani, Gorali, Kursenieki, Luzichani, Lemkosi, Oledrzi, Mazuri
Each of those groups, Silesians included, indentifies as Poles first and formemost. And Luzichani, Lemkosi, Oledrzi, Mazuri are extincted as separate groups. Being Polish is just attractive enough so that there're no fuel for any significant autonomy movememnts .
Even a German-sponsored "Silesian Autonomy Movement" has completely lost its momentum and dissapeared as a political organization of any importance. That was even publicly stated by its leader last year.