Nope. Whichever imaginary friend people think they have is of absolutely no concern to me whatsoever - especially when people use said imaginary friend to justify their own bigotry, terrible behaviour or as an excuse to tell other people what to think and do.

On the other hand, quiet believers of (any) faith, who live their own lives by some 'higher' creed without inflicting it on others - like my near neighbours - are fine by me. Live and let live in that case.