Why is it necessary to be vegan?

Thich Nhat Hanh is a Buddhist Zen Master. He is a global spiritual leader, an author, a poet, and a peace activist. He has written many books about mindfulness and peace. He promotes being present, living in the moment, and gives many tips on how to have a happy and simple life. Thich Nhat Hanh is also a vegan because he knows it is the most compassionate thing to do. In this video, he explains that everyone must be vegan in order to end animal suffering. He even touches on the importance of giving up cheese and milk to truly show your compassion for animals.