In this powerful video, Fr. Peter Heers reveals how ecumenism leads to the demonic adulteration of the Orthodox faith, a gradual process that distorts the truth and threatens the very core of Church tradition. Beginning with coexistence and moving through dialogue, infiltration, and finally subversion, ecumenism is shown to be a subtle force of corruption within the Church. 

Fr. Peter draws on the teachings of the Church Fathers, Scripture, and Ecumenical Councils to explain why the Orthodox Church must stand firm in defending its boundaries against these dangerous influences. The video offers a clear explanation of how demonic adulteration is not merely a theological error but a spiritual threat that compromises the salvation of souls. Orthodox Christians must understand and recognize these stages to safeguard their faith.