The recognition is a step forward and better than being ignored. It is similar to non-Jews wishing Jews “Happy Chanuka” because it comes at the same time as Christmas. Chanuka is a minor holiday compared to Shavuot and Sukkot which are unknown to non-Jews. When was the last time any non-Jew wished someone a “Happy Purim”? It doesn’t happen because it is not connected to something that they care personally about, like Christmas.
Today’s war on terrorism will continue to be waged when nations see their interests being threatened. The outpouring of emotion will also be rooted in selfish preservation.
While it may have been called a “unity march”, the Jews of Europe have been educated about their place in society.