The biased language that is found in line 3 is that of religion.
Explanation:
In the conversation happening between Haley and Kenneth, Kenneth is trying to convince Haley that her complaints about Francis cannot be true simply because he won't act that way for he is a catholic by religion.
According to Kenneth, not steal is a trait of Francis just because he is a catholic.
This can be considered as religious bias for the very fact that good nature is being tried to be associated with a specific religion.
