Islam teaches that everyone is born a Muslim and only ceases to be a Muslim if they convert to another religion.
The Prophet Muhammad said, “No babe is born but upon Fitra (as a Muslim). It is his parents who make him a Jew or a Christian or a Polytheist.” (Sahih Muslim, Book 033, Number 6426)
The Koran, 17:111 says “And say: (All) praise is due to Allah, Who has not taken a son and Who has not a partner in the kingdom, and Who has not a helper to save Him from disgrace; and proclaim His greatness magnifying (Him).”
1 John 2:22 says, “Who is the liar, if not the one who denies that Jesus is the Messiah? This one is the Antichrist: the one who denies the Father and the Son.”
John 3:18 says”…anyone who does not believe is already condemned, because he has not believed in the name of the One and Only Son of God.”
Let God Be God, let Allah be Antichrist, and let every Muslim be a condemned liar.