I found that after growing up in an extreme Christian environment (we went to church twice every Sunday and every Thursday evening, I was forced to participate in "ministries" that had me at church 7 days a week) that it became difficult to get rid of the idea that Christians in the US are persecuted. It is very prevalent in sermons and among the congregation. Even after it was clear I did not believe in the religion (I actually told my mother when I was around 10, it didn't help... that's why I was forced to participate in Art Ministry, work as an ASL translator on Thursday evenings, work with the Prison Ministry (also as a translator)...)
Anyway, getting too much into my personal past... it was difficult to get past some parts that were pervasive. It took a long time to get to a point where I wouldn't automatically resist when someone smack talked Christianity.