If I had to exclude all sinners from my life and my gatherings, I'd be a sad and lonely person and I'd have to figure out what to do with myself because I often find myself coming short of perfection.
At this very time, my atheist brother and his wife are staying with us. I love them, I make no bones about my religion and I don't allow them to denigrate God or religion and they accept that and are welcome.
I think what they are both doing is despicable. I will stand my ground on the basis that it will send the wrong message to my other kids. I have let him know ahead of time what he is doing is wrong and still he defies his family and continues with his "choice". I am spent, I don't know what else to say to him. He dishonors us.
But no one said exclude sinners!
They said do not dignify social sin (that is a sin committed habitually by two people) with social acceptance.