1) Genesis 19: The story of Sodom and Gomorrah. Not actually about the sin of homosexual sex. If you read the story carefully, you may come to one of two conclusions - that the sin committed is rape, or that the sin committed is to turn away a stranger.
2) Leviticus 18:22 and Leviticus 20:13. The word that is translated as "Man" is thought to be a reference to Men in one's family (incest). In other words, it is saying if you prohibited from having sex with this female family member, the same goes for male family members. This makes sense since these verses occur alongside verses specifically about incest.
3) The accounts of King David and Jonathan, and of Ruth and Naomi are both highly homoerotic.
4) Matthew 8; Luke 7 - the story of the Roman Centurion's servant. The word that is commonly translated as "servant" or "slave" in this story was also historically used to describe the younger partner in a homosexual relationship. Jesus healed the homosexual partner of a Roman soldier and even praised him for his show of faith.
5) Do unto others as you would have done unto you. I can't stress this enough. It's the one rule to rule them all. You wouldn't want to be told who to love, who to marry, how to show your affection to them, would you? Then don't do it to others. As long as it's a consensual relationship between two adults, no one has the right to interfere.
I'm a former Christian who has spent 20 + years (the majority of my life) studying all religions and faiths. Even though I had previously rejected Christianity completely, I've come to appreciate it as a bedrock of modern morality and realized that there is much wisdom in the Bible. With that said, I've also learned not to trust mainstream preachers, ministers, or priests when it comes to their understanding of the Bible. It is horribly mistranslated, misinterpreted, and taken out of context by the current Christian establishments for their own purposes.
Hate gets butts in pews. If you wonder why the Bible is being presented as anti-homosexual, it comes down to that simple fact. Whether it's a conscious decision on behalf of the various denominations or not is debatable, but the cause and effect of hate affecting church attendance is clear to me.