What about the person who claims to be different from birth, and argues "Because I'm saved, that means I'm chosen ... and it says so in scripture!"
(The whole predestination thing, the idea that God created some of us in advance to be saved and others no option but to be condemned, goes back to 16th century French theologian John Calvin. Calvin enjoyed describing rules for everything from excommunication to the manner and frequency of "the Lord's supper" to when congregational singing was appropriate. Calvin even revised marriage laws, too.
(Calvin was also instrumental in having his theological opponent, Michael Servetus, burnt alive at the stake in October 1553. For some people, Calvinism and the idea of being "born saved n' special" has lots of appeal ... even more appeal than scripture.)
In his mercy, God chose to save us: there is nothing we can do, no good work we can perform, no scheme or plan we can design and thereby chose to save ourselves.
Because we've done nothing to save ourselves, how can a believer mock or feel superior to a sinner? None of us were born good or righteous or holy in God's eyes, and scripture teaches us to follow Christ, not some warped and self-serving man-made theology, and Jesus never turned up his nose at anybody.
One last thing: it wasn't "sinners" who demanded Christ's crucifixion; it was the "good" church people, including the temple leaders, who felt threatened not just by Christ's words and miracles ... but by his example, too.
The King will reply, 'I tell you the truth, whatever you did for one of the least of these brothers of mine, you did for me.'
- Matthew 25:40
He will reply, 'I tell you the truth, whatever you did not do for one of the least of these, you did not do for me.'
- Matthew 25:45
"A new command I give you: Love one another. As I have loved you, so you must love one another. By this all men will know that you are my disciples, if you love one another."
- John 13:34-25
