You are hurting other people.
Wouldn't that be so without the bible? That is, we don't need the bible to tell us that much, right? It was so before the bible, it's so now and will be so long after anything of this world remains.
As a related tangent, consent is not a factor like the left claims. Homo relationships that are consenting are evil as people in them are hurt.
It goes far beyond the people in those relationships. It undermines the entire society. It is a direct attack on the basic building block of civil society.
Take adultery as perhaps the clearest example...
Adultery causes divorce. Divorce causes fatherlessness. Fatherlessness causes...
- poverty
- increased gang membership/activity
- alcohol abuse and drug use
- criminality in general
- teen pregnancy
- abortion
- teen suicide
And that doesn't even mention the fact that adultery is among the most common motives for murder. Indeed, if you watch any amount of "true crime" television programming, you'll notice that there are three things that you can do to make almost certain that you will never be murdered nor will you ever be a murderer...
- Do not get drunk or high.
- Do not hang out with people who get drunk or high.
- Do not have sex with anyone that you aren't married to.
Just follow those three rules and unless you just happen to be the victim of a mass murder or the random victim of a serial killer, then the likelihood of you killing someone or being killed by someone drops to very nearly zero.
Homosexuality has many of the same consequences for the same reasons, but it has various particular effects such as greater exposure to disease, particularly HIV/AIDS which results in premature deaths. And there is associated depression, substance abuse, domestic violence, suicide and homicide, all of which also and obviously result in premature deaths. It is simply astounding the number of serial killers who are homosexual, both of which mental disorders are caused by prolonged severe, almost always sexual, child abuse. Indeed, Bob Enyart used to say, and rightly so, that homosexuals reproduce by molesting children. If people convicted of child molestation were executed, in two generations (or less), there would be virtually no homosexuality in the society. You'd barely need a law against homosexuality because homosexuals would be as rare as hen's teeth.