Besides sports, I can't think of anything as universally polarizing as religion.
Yes, I'm making this observation as a believer.
Just look at history. Wars waged because of it. Slavery condoned in its name. Lunatics carrying out unspeakable acts for the glory of God - or so they claim.
Even now, religion plays a part in our political and cultural consciousness like never before. Heck, Republicans - and religious conservatives - would have anointed Mitt Romney as their presidential candidate a long time ago if he wasn't so, so Mormon.
Religion is the judgmental gauge that got singer Cee Lo Green in trouble - with atheists, of all people - for changing the lyrics of the John Lennon classic "Imagine." It's the sanctimonious hammer Rick Santorum uses to bash those of God's children who may not agree with his male-female version of love.