Because it’s obvious sodomy is unnatural, destructive (to the soul and anatomically), and disgusting. And the more its nature is openly discussed, the more it becomes (rightly) reviled.
Of course, we love those who struggle with same-sex attraction and sins such as these. I am prone to my own set of sinful behavior, about which I must be ever-vigilant and repent if I fall. Those who would flatter me otherwise don’t “love” me—in truth, they hate me.
So I will never hate my brothers and sisters who struggle with such sins by supporting them in them.
Those who engage in sodomy and related sins are in the exact same boat as me: sinners in need of repentance. To embrace “pride” in such behaviors is, in truth, to hate sinners, not love them. It is to consign their souls to Satan.
True love says to that: “No.”
It's important to keep in mind what "same-sex attraction" means. The bottom line is it's a male who masturbates, and who especially in this sexualized society we live in since oh, about 1963, doesn't know what that struggle is like? but it's a male who masturbates and wants another male there with him while he masturbates; so they can masturbate together. Like, that's what we're talking about.
And that's why conservatives, when they hear that two males who like to masturbate together, want to adopt children, are horrified, because it's like, hold on; I'm not even OK with what you two are doing alone by yourself; that is disgusting, and to put it objectively and not to humiliate anybody, it is disordered—but I absolutely don't want you two faggots to have kids—no way. I'm already being gracious and merciful to let you two play with yourselves together; that's already outdated and backward enough; permitting kids to live with you two too—no.