It’s the RCC that says they incorporated pagan practices.
Incorporating a belief or having a similar or practice do not make the two identical> Son of God born from virgin
All of these “religions” share the belief that their savior was born of a virgin. According to your “logic” ALL of Christianity is pagan. Are you admitting to being a pagan?
Attis Cybele Turkey/Anatolia 2100 BCE
Tammuz Ishtar Syria 2000 BCE
Shamgar Anat Mari, Syria 2000 BCE
Horus Isis Egypt 1900 BCE
Horon Astarte Phoenicia/Syria 1750 BCE
Dionysus Semele Phoenicia/Syria 1500 BCE
Krishna Maia Hindu 1140 BCE
Heracles/Hercules Alcmene Greece 690 BCE
Buddha Maya India 620 BCE
Quetzalcoatl Cihuacoatl Mexico, Hopi 400 BCE
Adonis Io Greece 400 BCE