Even if you believe that Israel's policies are wrong, how does it make sense to punish Jews all over the world because of that? Is anybody committing hate crimes against Chinese people across the globe to protest China's policies against Tibet? This is a unique case in the world and the common factor between hating Israelis and Diaspora Jews equally is one thing - they're all Jews. That's why it's considered anti-semitism.
27 injured in fire, explosion at former air raid shelter in Hamburg, Germany (DPA)