The fulness of the gentiles

In 'The Fulness of the Gentiles, the author presents a remarkable exegesis of this biblical concept. Rev. Dr. A.A. Leenhouts explains this 'Fulness of the Gentiles' as 'God breaking His silence' through a filfilling act of salvation in the Gentile world, in order to 'graft His chosen people into their own olive tree again'. In this way, he states that a consistency can be  observed in God's actions by involving the Gentile world for the purpose of the salvation and restoration of the Jewish people. Furthermore, he states that there is a causal connection between the timing of the 'fulness of the gentiles' and the conversion of Israel, which will ultimately result in the advent of the millennial kingdom, the 'pre-Sabbath' of the nations.
The author observes a gap, created by the Church and theologians, between the 'restoration of the kingdom to Israel' and Jesus' commission to world mission. According to Rev. Leenhouts, this is the reason why every ecumenical striving is nipped in the bud, and any attemptt at world peace is endlessly frustrated. This gap became official in 325 AD, when the Church separated itself from Judaism by establishing its own date for celebrating Easter.
According to the author, the restoration of the kingdom to Israel really means the breakthrough of the kingdom of God and the dawn of times of refreshing.