Antisemetism: hostility to or prejudice against Jewish people.
Antizionism: hostility to or prejudice against the Zionist project.
This is where the lines get blurred. Zionism is a political ideology which seeks to overtake the land of Palestine and its neighbors (Jordan, Egypt) to form ‘Greater Israel’. Its being carried out by the government of Israel along with the US (AIPAC + Evangelical Christians). People moving into Israel may not realise that they are all contributing to this ideology disguised under Judaism. Ignorance is not an excuse if it costs lives.