After you've said "What part don't you agree with", if the person answers:

I don't think faith is enough -- you also need to be good
   If it depended even to a small degree on being good, you would never know if you were good enough.
   It is also like saying that Jesus' work on the cross was not sufficient.
   Christians are not against doing good: it is just that doing good is not a basis for knowing that God has accepted you.
   Trusting Jesus results in you having "new life," which shows itself by doing good. More on faith

I don't agree with baptism.
   Christ told us to baptize
   it was the accepted custom of the New Testament Christians
   Baptism has many promises associated with it. More on baptism.
  

Return to list of specific objections