In the mid-2nd century CE, Christianity began a gradual process of identity-formation that would lead to the creation of a separate, independent religion from Judaism. Initially, Christians were one of many groups of Jews found throughout the Roman Empire. The 2nd century CE experienced a change in the demographics, the introduction of institutional hierarchy, and the creation of Christian dogma.
This is a companion discussion topic for the original content at https://www.worldhistory.org/article/1785/the-separation-of-christianity-from-judaism/.