Polish national sport- does it exist?

Hi, I'm 17 yo Polish student. Sometimes I ask myself..

I don't think that Poland has national sport...

Football? The supporters are very divided. 90% of supporters are angry, drunk and want to fight with you.. Is that really sport? I though that sport should connect people.
Volleyball? Similar to football. No one is friend.
Basketball? No. Every Polish team has foreigners. Without them THEY are losers.
Ski Jumping.. hmm it could be but.. winter is not eternal and really how many people support Polish jumpers?

What are you thinking about it?