Who is Dorje Shugden?

A Prayer to Dorje Shugden recited by H.E. Tsem Rinpoche

This image directly below has been shared through H.H. Buddha Maitreya Jesus’ online virtual Dharshans.
H.H. the Reincarnation of Je Tsong Khapa,
Lama Dorje Video Enthronment Ceremony & Teaching
H.H. Buddha Maitreya the Christ
Jesus also recently (2021) shared these slides on Dorje Shugden
Who’s the Real Dalai Lama?