By Stephen Brown BERLIN (Reuters) - Germany's foreign minister said at an international conference on anti-semitism on Thursday that "hatred of Jews" was on the rise once more in his country and across Europe, fueled by spiraling violence in the Middle East. Frank-Walter Steinmeier said Germany's Jews were subjected to threats and attacks at pro-Palestinian demonstrations, and the conflict between Israel in Gaza must **t be used as justification for an anti-semitic behavior. ...