The Church or the new covenant aka Israel are those who follow Jesus Christ, i.e. traditional Catholics and I even dare to say Orthodox Catholics. Ecumenism and liberalism are hallmarks of protestantism which is the line that has been forced onto us by the Novus Ordo heretics who are purposely taking the people of God to hell. Jesus warned us about that on Mat 7:15.
They were killed by Titus under God's will as Jesus said it would happen when he expelled nth perfidious jews from the temple. Those who call themselves jews and are not belong to the synagogue of satan.