As America goes, so goes Poland, Ireland and the world. It's only a question of time.
Not necessarily. But if you want get into stats, there's loads of information out there from reputable sources regarding the EU which is really more relevant when discussing Poland. Also bear in mind that domestic violence has existed ever since men and women began living together in whatever form and that in the USA or Ireland or Poland of fifty years ago when people generally got married, there were plenty of women knocked about by violent husbands. Being married made no difference. Anyway this tragic case from Poland has less to do with domestic violence and is more along the lines of a crime of passion. It's about hate,rage, vengeance etc and as other posters have pointed out, you are using it in a very callous manner to give you an excuse to discuss one of your, let's call it, areas of interest.