Some of us do eat meat, only the clean meat as directed by God after the flood. The vegetarian live style is taken from Genesis and the creation.It is a choice. Many believe we will have a plant based died in heaven, so why wait. It is also a fact that a plant based diet will make you healthier, and you will live longer.
Some Adventists are vegetarians because they think its healthy, but fish is meat. http://www.sdada.org/position.htm according to this link, they believe that fish is high in saturated fat and cholesterol, lmfao.