If the conversion is done forecefully than its wrong because Islamic scripture and law forbids forced conversion in theory,[14] In opposition to forced Islamization, verse of the Qur'an (2:256) is frequently cited, reading "let there be no compulsion in religion" Muhammed and his followers never practice forced conversion of the Pagan Arabs during Muhammad's conquest of Arabia. None of the Quraish was forced to become Muslim, but Muhammads victory convinced some of his most principled opponents, such as Abu Sufyan, that the old religion had failed.
So if any muslims converts a non muslims forcefully or may by money and muscle power its considered as one of the biggest sin in islam .
However islam is rapidly spreading in the west especially in europe and america but almost zero cases are under forcefull conversion its because most of them convert when they read the quran and realise its the word of God and islam is a peacefull religion.
but forced conversions is wrong and un acceptable
