" ... Let there be no compulsion in religion: Truth stands out clear from Error ..." [The Qur'an 2/Al-Baqara/256]
This is Islam's unambiguous affirmation of freedom of faith, which also applies to changing of faith. The Qur'an illuminates before the humanity the two highways [90:10], one of which leads to salvation. Islam is an invitation to the highway toward salvation, but it is based on FREEDOM OF CHOICE.