How did the sect form?

The beginning of Anti Trinitarianism  in the Protestant Reformation involved Michael Servetus and a reformer named Oecolampadius. Servetus was in the Swiss city of Basel. He was studying Hebrew and Theology with Oecolampadius. However, they had different opinions on the dogma of the trinity. They believed that there was no Holy Spirit. Eventuly Servetus tried to convince the reformer that his view was correct and was "backed up" biblically. Oecolampadius saw Michael's views as radical and kicked him out of his study. Stubborn and opinionated, Servetus left and formed his own Protestant sect.