does it matter?
I let people in my house, does that mean I cannot choose not to let someone in my house?
If you have a business charging admission to your home, then you could not discriminate.
I think the key is whether or not the "house" is actually a house or (at least temporarily) a business establishment.
You have complete control over who may come into your house But that's less true with a business establishment.
Having said that, this is an obvious case where a religious exemption should apply.
It shouldn't, unless they charge. And then I'd question their claim that it's not a place of public accommodation.
But still, matters of traditionally questionable morality should not be forced on businesses. It's different than civil rights.
I let people in my house, does that mean I cannot choose not to let someone in my house?
Correct, this is known as “hope and change”. Since you once let someone into your house it would be discrimination to not allow anyone who wants to come in to do so. This is reflected in our open border policy.
That's coming, at least for protected species like homosexuals or Teens or Moslems.