Jesus followers began to be called “ Christians” At Antioch those who learned from and followed his ways ot in other words jesus disciples began to be called “ Christian’s “
That they were Christians and followed Him was because they truly believed that He alone was God, Lord, Savior, and King. But just mimicking His actions, of itself, would not make anyone into a Christian (if that is your point). Until one first believes and is anchored in such belief, they are not actually Christian - and that can only occur as a gift from God through salvation and becoming born-again. Being a true a Christian along with the actions that accompany it, originates within and moves without, not the reverse - it all is God's work, none of it ours.