You did a good job letting her know your reasons for no longer wanting to attend. The first things that come to mind when someone leaves is that they are engaged in wrongdoing or have been stumbled. It never occurs to them that we have used our brainpower to get outta there.
Loved that you got her thinking about the true identifiers of a christian according to the bible. It's so difficult for witnesses to see that they are focusing on the wrong things.