Members of Germany's Jewish population are being warned to avoid wearing the traditional kippah cap in favor of alternative headcoverings (archived). The rise in anti-Jewish violence appears to be tied to increasing immigration and diversity with Arabic speaking Germans presenting the greatest threat to streetwalking Jews. This not the first time Jews in Germany have been subject to escalating violence, but the move from German speaking Germans to Arabic speaking Germans as aggressors this century brings new energy to an old meme.