> Only one person has ever lived the perfect Christian life,
Yes. Herman Schmikkleman, of Atlantic City, New Jersey.
> and He now resides on the right hand of the Father.
Which is rather unfortunate for the Father, as ol' Herman weighed in at 455 pounds...
> It makes as much sense as my lecturing a Buddhist on why he is not a good Buddhist, or telling an animist that he can't be a good animist because he does x, y and z.
Tell me: if you knew that the religion of, say, Islam says that Muslims are NOT supposed to get likkered up and eat a ham samich, and you saw a Muslim doing exactly that.... where is the logical flaw in you pointing this out to said Muslim?
> My opinion on their religion is invalid and would be ignored. Likewise, non-Christians have no valid viewpoint on how a Christian should live his faith.
That's just bizarre. An atheist can point out unChrist-like behavior in a Christian as well as anyone else, and quite possibly better oweing to a more objective position. Christianity is not a Mystery Religion, with it's tenets open for only the initiated to examine. It is, in fact, an open book.
Sure. An atheist can make whatever judgements he wishes about how a person is living his or her Christian life. But, nothing in the universe is less relevent. And nothing in the universe is more deserving of being ignored.
Are you as anxious to point out when Christians, according to your judgement, are properly living their faith (you know, stuff like the millions of tons of food and medical supplies provided to those who would otherwise starve or die, etc etc), or are you only "amused" by their failures?