Good for who?
I hope for children of Poland, Belarus and all other Slavic children.
A force of evil that's for sure!
I think not. He told to Polish students even back in 2008 that Poland recognized Kosovo under pressure of NATO and EU partners, while he love Serbs. In other words, Tusk told to NATO and EU, and to public, that `red line` in pressure on Poland by NATO and EU do exist.
One needed to be brave to tell that at that moment. Also, to survive that, one needed to be holder of balance of interests.