Because, knomie, you're being hypocritical. You're taking one verse literally and the other metaphorically because that's how it suits you.
You pick and choose what of the Bible you want to believe while in the same breath stating that the bible is true, and gods word and blah blah.
I tried out Christianity for a good while in high school and rejected it in the end because I got sick of hypocrites using bible verses to prove points instead and then saying in response to other things "well, we can disregard that now, that's not what Jesus said".
And then you make homophobic statements but can be covered because you're doing it in the name of god and you're entitled to your religious beliefs?
I'm techincally Jewish, but I bet if I said "well the torah says black people are sinners because they're black" I'd be called out as a racist, and rightly so. I don't hide behind my religion in order to spout bigoted views.