Mentally Steyven says "If the land itself is tainted, we'll first need to heal the land, or move them to an untainted place."
Outloud he says "Yes, we are here to help! And I am not as different from you as you might imagine, friends. I too was once corrupted, and depraved. I committed terrible crimes, and was for a time lost to madness! But I was redeemed, and so can you be! Here! Today! There are those among us who can remove your Taint, give you a new lease on life, as I was once given! We are here to clean the corruption from your homes, and from you!"