Backing the "anti-conversion" legislation brought by Uttar Pradesh government, Defence Minister Rajnath Singh on Wednesday said that he personally does not support conversion for marriage. "I want to ask why there should be a conversion. The practice of mass conversions should stop. As far as I know, in the Muslim religion, one cannot marry someone from another religion. I personally do not approve of conversion for marriage," Rajnath Singh told ANI in an exclusive interview.