Ephesians is about the triumph of Christ over supernatural forces and how he is bringing unity to all things. One of the key passages for understanding this is Ephesians 4. Ephesians 4:1-6 bases an encouragement to unity on a Trinitarian reflection (One Spirit, One Lord, One God and Father). Then verses 7-16 shift the focus to diversity within unity.
It is a tragic mistake to blame the Jewish people for the crucifixion of Jesus. True followers of Jesus are encouraged to speak out against this mistaken notion and oppose every expression of anti-Semitism.