A Bible study member told me that they use graven images but it's in human form to represent Jesus. It is not in any animal form so it isnt considered as an idol.
How can I politely explain it to her? I am trying to be careful not to touch religion as our purpose is to point people to Jesus not argue with them.

The Lord is my strength and my shield;my heart trusted in him, and I am helped:therefore my heart greatly rejoiceth; and with my song will I praise him. Psalm 28:7 (KJV)