The top prelate made the remark at a function at Mathota Rajamaha Vihara in Mannar.
Noting that Lord Buddha preached for all, he said anyone could follow his preachings to attain Nibbana.
Religions are there for the furtherance of the world and no religious teacher expected his religion would lead to war, he said.
All are humans, he stressed, adding that history taught us that religious and ethnic divisions led to degeneration of the human race.
Everyone should think alike and live in co-existence and brotherhood, the Mahanayake Thera said.