Who doesn't want to think their faith makes them the best? Humble people don't want to think that I suppose. If anything, our faith makes us more accountable before God since we claim to have a direct line to God through a prophet, but people are people. Israel had a direct line to God through prophets and look at what happened to then. They still worshiped false gods!
People will be good or bad regardless of the religion. I hope that as Christians, we are more inclined to do good deeds rather. It has been my experience at the beginning of my walk with Christ that LDS earnestly endeavor to live the teachings of Christ.
I have been a LDS Christian too long to assume someone will be nice to me just because we go to the same church. It is not the case. I have met people with racist ideas and notions. I have met rude people. I met these people in church!