Still waiting for you to show *actual* harm.
Well, first you'll have to stop being deliberately stupid.
Without equality under the law, the wealthy and powerful will be free to abuse and oppress those who are not as wealthy and powerful. Which is why equality under the law was an essential principal in the founding of our nation. Sadly, though, we did not live up to that principle from the beginning, and we allowed men of color, and women, to be considered less than equal to a white man. And the result was the very abuse and oppression this the nation was founded to try and stop.
Finally, after many years of suffering, abuse, and strife, we have altered most of our laws so that women and men of color are treated as equals to white men, but we still have a ways to go in eliminating our prejudices from law, so that ALL HUMAN BEINGS are treated as equal in the eyes of the law. And until we do so, we will still have people of wealth and power abusing and oppressing people of lesser wealth and power.
It is ESSENTIAL that we uphold and maintain the principal of equality under the law so that all citizens can be equally free, equally safe, and held equally responsible for respecting the freedoms of everyone else. Without this basic ideal, abuse and oppression will inevitably result, as it has always done throughout all of human history. And maintaining this principal is FAR, FAR,
FAR, more important than some prejudiced Christian's desire to abuse and insult gay people by refusing to serve them as they would serve everyone else just because they want to get married.
I am not interested in what you believe this could lead to.
Of course you aren't, because you want to ignore the disastrous consequences of allowing some citizens to abuse and oppress the rights of other citizens in the name of religious prejudice. You don't want to see the terrible harm and suffering that allowing such abuse leads to. You want to pretend this is just about flowers. But it's not about the flowers, or the cakes, and the photos. It's about people abusing and insulting the rights of other people and expecting the law to allow them to do it because they're "Christians".