You're avoiding answering the question. These Christians' intentions are to follow Christ, but they inevitably mess up. Everyone does some good and some bad, even these Christians that you disown.
So they've got the intention. They've got the good deeds (perhaps less than you). And they do wrong (perhaps more than you). So they're just like you but to a different extent. Now where is the line (i.e. how much good and how little bad) that makes them a proper Christian?
I know there is no actual definitive answer to that, but I really want to know what parameters you use to decide who is legit and who's not.
Again, they want to follow Jesus. They try to follow Jesus. Their weakness lets them down, but if they're truly sorry, they're forgiven. How are they not real Cs?