Of course Buddha was not a Buddhist....but his teaching created Buddhism. Gautama Buddha, also known as Siddhārtha Gautama, Shakyamuni, or simply the Buddha, was a sage on whose teachings Buddhism was founded.
Judeo/Christian/Islam – are all the Human Sacrifice Religion of Abraham
Christianity is 6,000 plus years old, not merely 2,000 years since the non-existent Jesus (Hey-Zeus). All sun god worship (including the Jesus myth) has its source in the constellations, the sun and earth. Jesus didn't exist, he was made up to create Christianity but it's the same teaching as the old testament with a different twist. It really doesn't matter what he was since he never existed.
The Jewish / Christian connection enjoined with the creation of Islam in the early 7th century AD. This brought together the 3 major players, collectively known as the Children of Abraham, or the children of HUMAN SACRIFICE,
Muhammad is the Islamic prophet, the revelations (or Ayah, "Signs of God]") — which Muhammad reported receiving from ANGELS (It should be noted that the word English, literally means, Angel-man. The word ANGEL is, in turn, derived from the word ANGLE. This is an extremely strong point to realize, as the whole power of the hypnotic trance working through the illusory body of humanity is based on the sacred geometry and the angles, or angels used, to develop the religious and scientific 3 dimensional space we exist in. There is actually no such thing as a spirit entity or an angel.) until his death – form the verses of the Quran, regarded by Muslims as the "Word of God" and around which the religion is based. He was also a military leader, so he didn't just teach how to love, he also taught how to kill.
As for LOVE as a Religion...you don't want me to go there on that one. LOVE is an arbitrary concept with no basis in reality or truth. Love is completely undefinable! :)