Premise 1: Since God is perfect, there can only be one God - there cannot be two perfect Gods.
Premise 2: Based on Scriptures, Jesus Christ is God.
Premise 3: Jesus had organized a group of people to preach what He taught.
This was to become His Church.
Premise 4: There can only be one Church that truly represents Jesus' teachings since, being the one true God,
there can only be one perfect version of His teachings - His.