Who founded (started) the Christian religion?

Answer:

Jesus and his Apostles

Is Christianity a Monotheistic (one god) or a
Polytheistic (many gods) religion?

Answer: would it be Polytheistic since they
believe in God, Jesus being his son, and the Holy Spirit.

Christianity is considered a monotheistic religion.

Here are a couple of explanations.

http://www.godcontention.org/compare-religions/how-is-the-trinity-monotheistic

http://carm.org/does-the-trinity-really-teach-there-are-three-gods

Christianity is a monotheistic religion, which means it believes in the existence of only one God. The concept of the Holy Trinity, which includes God the Father, Jesus Christ (the son of God), and the Holy Spirit, does not imply polytheism but rather represents different aspects or forms of the same divine being within Christian theology.

To find the answer to who founded the Christian religion, we need to delve into historical and religious texts. The founder of Christianity is generally considered to be Jesus Christ. According to Christian belief, Jesus was the Son of God who came to Earth to save humanity from sin and offer salvation through his crucifixion and resurrection. He preached his teachings, gathered disciples (known as apostles), and established the foundation of Christian faith and teachings.

The primary source of information about Jesus' life and teachings is the New Testament of the Bible, particularly the Four Gospels (Matthew, Mark, Luke, and John). These texts provide the accounts of Jesus' life, his ministry, and his interactions with his disciples. The apostles played a significant role in spreading his teachings and establishing the early Christian community.

Therefore, the founders of the Christian religion are considered to be Jesus Christ and his Apostles.