If so, then the term "anti-semitism" has utterly lost any significance ... it's just an insult-phrase, meaning "people I don't like".
Not really. It's people I don't like for a particular reason (i.e., their race or ethnic/social group). In reality, we know that witnessing to Jewish people is not an act of hatred but of love. If one truly believes what the Christian religion teaches, but hated the Jews, the logical thing would be to NOT witness to them and help them from perishing. Evangelistic efforts towards people of other religions are therefore not acts of hatred but of love. Coercive "evangelism" is not Christian.