We believe that christianity is not only for christians but also for all the humans that is why every one is allowed in the church. Yes, some non-christians are coming to church and convert into christians, some are not, some are coming to church and also to other places of worship. It is the individual's choice. If somebody comes to the church and getting coverted into christianity what is wrong in it. You are afraid that if this trend continues all the hindus will convert into christianity. If God's wish is like that no one can stop it. What do you mean by church does NOT recognize non-christian-christian marriages! Why should church recognize or derecognize a marriage? Recognition of marriage is the duty of the government not the church. For example if a marriage is done in the church the govt. is recognising it and not the vice versa happens. Even if there is a marriage between christian and non-christian happened the couple can come to the church for worshipping. The church will not be washed for purification because christianity gives importance only to purification of mind. Christianity NEVER discriminates in terms of caste. Even a dalit can become priests and bishops (it happened and is happening) in the church.