The Bulgarians were never tengriists, neither we worshipped Tengri, tengriism is a primitive shamanism and has absolutely nothing in common with our pagan pre-christian beliefs. The Bulgarians were early Zoroastrians - the cult to the Sun and the Fire, we were building fire temples like the Persian ones. There is not even one evidence to support the thesis that we were tengriists or that we called the god with the name Tangra/Tengri. In fact there is this evidence by the Persian scholar Al-Balkhi that says: "I heard the Bulgarians call the Creator with the name Edfu and when I asked them how they﻿ call their idol, they answered Fa." - Al-Balkhi, a persian scholar lived in the 9th century. (M. Tahir, Le livre de la creation de el-Balhi. Paris, 1899, v. IV, p. 56).
Articles like this one filled with turkish crap and administrated by primitive psycho-sick people like this jingby makes wikipedia look highly unreliable, now I understand why it is forbidden to be cited in scientific and academical studies and universities.