What difference if he were? The fate of his soul was sealed when he took his last breath. The fate of his body is immaterial to that of his soul. I think the concern is over the possibility that some might mistake Catholicism for Lutheranism or Christianity. There is a historical problem of people mistaking the philosophies of men for the dictates of God. People don't have to attend if it's a problem.
Is it ever possible for you to post without being offensive? But I'm impressed: you managed to imply in one post that neither Lutherans nor Catholics are Christians, thus offending both at once.