How have you come to the conclusion that our ancestors went thru the pain/trauma at the time of conversion.You should try to know the fact before you say something. The best way to prove anything is to look into the current affairs, take the case of MohammedJalal Shaikh, his wife who have recently embraced Islam is not only happy but proud to be Muslim. In fact conversion need broad thinking like her & not like that of yours who are satisfied by calling God to the one who are human beings
