Gotta be divisive, hm? You can't simply affirm Scripture. Nice.
I’d like to think that ZC was just saying that most ‘christians’ are prone to misinterpreting [actually not even reading for themselves] the scriptures. Few there be that find it ~ salvation in Jesus Christ alone - see Romans 10:9-13.
Do not take the name of the Lord in vain is often interpreted as profanity mixed with references to God, but another more probable simple meaning is:
Do not pump yourself up with pride [vanity=pride] or be a chest-thumping christian. Are we not instructed to be meek and humble and boast only in what the Lord has done? Being a pride-filled christian is the worst sort ~ if one at all...