It wasn't required in order to attend the church! Just as a volunteer. And a past conviction for drug possession, for example, wouldn't have raised a red flag in this situation.

Respectfully, taking measures to protect vulnerable members of a community isn't in conflict with spiritual values of forgiveness and unconditional love. And being too quick to brush something under the rug as soon as someone says they've changed is part of what made child sexual abuse so widespread in the Church.