In the words of the Prophet Muhammad: "Every person is born with the innate religious faith (to submit to Allah, the Almighty".
Thus when an individual accepts Islam, he is not turning his back on any prior revelation but rather is returning to the original and true revelation of Allah and to his own nature as a creation of Allah. This being the case, Islam is your birthright-other religious or ideological systems are either corruptions or outright denials of Islam.
If you want to read the stories of the Returning Muslims, as to how they returned to Islam, please Click Here !