The bearded men have increased the crime rates in Spain, France, UK, Germany, Sweden etc. This is crystal clear if you look up statistics. Just in the last week there was a Aloha Snack Bar stabbing in Barcelona. Poland has low crime rates specifically because they have strict border controls.
You are free to personally visit Brussels to see what a shit hole it is.
Exactly how do you believe their borders are more strict given that they’re in Schengen? And how is the EU to blame for Belgium’s immigration policies but not Poland’s?