Those were false polls.
If they were false, and if Polish people support Serbia, why is the current populist govt still standing with NATO and recognising Kosovo, and still stationing troops in Kosovo against Serbia? If you are right, then the current govt would be an ally of Serbia and would follow the will of its people and reject Kosovo and bring home its troops.
But it isn't. Because you are deluded. And even your Polish heroes are against Serbia and favour Kosovo.
Just accept it, You are all alone in the world, even your Slavic 'brothers' are against you, sent by Poland to defend Kosovo from you, pointing their guns at you, right now. Slavs taking up arms against Serbs, in defence of Kosovo. That is the reality on the ground. Accept it, and beg for forgiveness.