The only reason why I used such an example is because it has sadly been done already at least one time if not more. I remembered it being brought up in the news right after whenever it took place. I don't remember how long ago it was.
I just want to politely explain why I was so offended by what you said. It implied that you believe that as long as you are not taking it to the level of murdering gay people, the things that you do and say about them are okay. I understand that your opinions are informed by your faith, I just hope that you one day find enough love in your heart and in that faith to understand that gay people are also human beings and that God loves them just as much as he loves you. You will be a better person when that day comes.
I disagree that you or I can possibly know what God intended for us all. Speaking for Him with such finality is dangerous, in my opinion. Part of the beauty of life is in it's mystery.
I'm going to be completely honest with you here, your comments above indicate bigotry. I don't know you, so I'm just telling you how they appear, but the fact that you believe that you are born with your sexuality, and that you, as a heterosexual, cannot change who you are but that gay people can indicates to me that you see gay people as somehow different or perhaps lesser. There is nothing good, or kind, or loving about this kind of thinking. I don't believe that there is anything about this kind of thinking that God would be proud of.
For what it's worth, I do believe that you don't think that you hate anyone. But the basis for some of your beliefs is not love.
Perhaps the Lord has put gay people on the planet as part of that plan. I find it very interesting that you believe that so much of this world is part of His plan or His decision, but that gayness is explicitly NOT part of His plan. Perhaps those gay people are here to adopt the children who would otherwise be abandoned, since, as you mention, they can't naturally have children of their own.
As for my logic being laughable, I believe that those on my side have the final "laugh" because same gender couples can't have kids without the help of someone from the other gender. My only question to you is have you ever stopped to wonder why same gender couples can not do such a thing alone?
I'm not sure why they have to. Is there something inherently wrong with not being able to conceive children? Should heterosexual couples with fertility issues be shamed? Is there something wrong with adoption? There are plenty of children on this planet who are desperate for loving parents, is there some specific reason why we should "laugh" at couples who may be able to provide that for them?