The nativity of Jesus in Matthew and Luke was a later insertion and cannot be found in earliest manuscript True or False?

This is a false assertion which is not supported by the textual evidence.

Quote"The earliest Christians, viz., the Ebionites, Nazarenes, Corinthians, &c., excluded as forgeries the two first chapters of Matthew, containing the miraculous conception and birth, declaring them to be spurious, and not to be found in the genuine copies of Matthew. Both Saint Jerome and Epiphanius allow that this is true."

See link "Matthew 2 Solar Mythology" for full text..