If you truly can't see why we would care if a group we don't personally belong to is being treated unfairly, I question how human you are.
Believe it or not, I understand perfectly.
Keep in mind that I'm trying to argue from your starting point (that is, the "six" on that scale Luigison posted - "
De Facto Atheist"), not from the position I actually hold to. Best process I can come up with starting from "there is no God" is "there is no God -> there is no objective morality -> I can do whatever I want, be altruistic or selfish or nice or a jerk and it doesn't matter what I choose, just what makes me happy." Please, tell me where the reasoning is flawed.
Now, contrast with what I really think: "there is a God -> He's laid down some pretty specific rules, like 'don't murder people' and 'don't steal' and 'don't lie with a man as one lies with a woman' -> probably a good idea to follow these rules, not just out of fear, but because I know they're right and good and because I want."
If it were up to me, I would just say "marry who you want, no big deal," but it's not. If you'll pardon the cliche, I don't make the rules.
Simply put, if you were the one being screwed over, your opinion would be different. That's why we help people in need.
Yeah, it would suck, but you wouldn't catch me going around pretending that there's some moral reason against it. I would fight against being screwed over because it's in my own interests to do so, not because I think these people are somehow morally wrong to screw me over. They have just as much right to screw me over as I have to not be screwed over.
This is the best explanation for "morality" we've got: http://www.youtube.com/watch?v=c1Yrbc5O1gI
That video doesn't seem like the best one to use for this particular debate since by definition homosexuals don't reproduce and thus don't contribute to the evolution of their species. Going by the "morality evolved from what collectively helps the human race" argument, homosexuals should be discriminated against
more, not less, since they're a drain on resources because they don't reproduce (a similar argument could be made for euthanizing retirees or the disabled).