I’ve known non-believers who could sing the most beautiful praises to God.
I do not judge whether he was saved, or not. Just as I do not for Obama. All I say is that I see little evidence of either knowing the Lord. But that’s God’s business, not mine.
We’ll all find out in the afterlife, if there is one or not. I hope there is. I can’t be certain of anything, I don’t have ‘blind faith’. I have hopes.