Both for Polish prosperity and, above all, security.
You mean for the security of papal influence in Poland?
This means that as long as Hungarians stick to revisionism, they are our enemies.
Modern day Croatia is illegally created by the illegal German recognition. So, process of Yugoslavia`s dissolution isn`t closed.
That mean territories of modern day Croatia, Bosnia-Herzegovina, Slovenia and North Macedonia aren`t legal. First, it was liberated by Serbia in WW1. Then people there wanted to join Serbia within Yugoslavia.
Now, Yugoslavia is no more. Hungary re-claim certain territories.
If Serbia come to agreement with Hungary, then Croatia, Bosnia-Herzegovina and Slovenia represent only virtual states illegally created. Stronger argument is that Serbia liberated those regions in war conflict of WW1 and, also Serbian historical rights (Serbian statehood in Bosnia-Herzegovina and regions of Croatia) then illegal statehood of those countries. Also, Hungarian holistically rights remain stronger argument then illegal statehood of those countries.