Mammoth sigh. I don't even need to discuss the "Thou Shalt Not Murder" part of the Ten Commandments.
One of the strongest Christian ladies I know (she lives in Raleigh, NC now) had the experience of watching CNN the night of the club bombing ... and saw her gay son milling around outside, and interviewed, too, I believe. She said that she was woken out of a sound sleep by the Father to see this ... so she would not see the news in the morning and experience the even momentary horror of believing her son might be dead.
There's more to the story, but let me just say that there was NOTHING good about this bombing. And no, she did not disavow her son. She did, however, meet with her son and his friends many times, and they spoke honestly about how she did not approve of their lifestyle, but loved her son, and his friends, as children of our Father. I wouldn't be surprised to hear if at least some of them have disavowed that lifestyle.