In reply to Chris the Tall:
OK, I've got one that I think is way more unpleasant than the gay hatred which can be extrapolated (by some people for whom the Bible is a convenient excuse to bolster their existing beliefs that gay = bad (after all, the bible was written by men and therefore is 'The Big Book Of Multiple Choice' (as you would expect from an imperfect book, written by men))) from parts of the bible.
How about the belief that we need redemption from our sins? It's a fairly core belief of Christianity. Jesus died for your sins etc. Some Christians will no doubt reply that I can't asume what they believe, and that they don't really believe such stuff...how presumptuous of me etc.
There are, after all, as many forms of Christianity, and Christian belief-sets, as there are Christians. But I don't think it's unfair to consider the redemption of mankind through the blood-sacrifice of Jesus Christ on the cross, a core Christian belief. We're discussing the wearing of a cross (death-torture instrument) here after all.
On its face a fairly innocuous statement, but concealing a depth of disdain for humanity which I find quite unpleasant. It doesn't really matter if you're a hell-fire kind of guy, a 'separation from god-ist' or an annihilationist, the wages of sin is death. People interpret that in different ways. But it does seem to me to mean that part of accepting the Christian message (and part of what the evangelist needs to convince the unbeliever of) is accepting that without the redeeming sacrifice of Christ, you will be getting, and crucially, it is right that you deserve, an eternity of hell/separation from god/annihilation. I can think of few things that debase human dignity more egregiously.
That, to me, would be part of what this lady's cross represents.