Most everybody does not include Italy in "Western" Europe. Italy is "South Europe", along with Spain, Portugal, Greece etc. Heck, even the European Commission divides Europe into West (fr, be, nl, uk, de), North (se, no, fi, baltics), South (es, it, pt, gr, cy) and East (the rest) in many of their policy studies. I have never been involved in any policy work where Italy was considered 'Western Europe' (part of 'the West', yes, but that's from a global perspective).