The No True Christian Fallacy

[Esquilax]

We must differentiate between a Christian's individual action and an individual action as a valid expression of Christianity to draw proper conclusions.

Here's the problem. I actually agree with you about the point you're making, but that doesn't mean that no fallacious reasoning is being employed when a christian makes a "no true christian would do X" statement, and I think the perfect example of that is encapsulated in the above quote.

What's a "valid expression of christianity"? So often it seems like christians using this argument are happy to merely define valid expressions of their religion as being solely positive things, looking through their rose colored glasses to do so, and hence simply remove any contention by fiat assertion, without doing any work. When negative things in the bible are brought up in response, the christian then defaults to some apologetic or another as to why that verse in the bible doesn't count, but this one that makes their point easier to defend is. Which means we're just supposed to use that specific christian's interpretation of their religion as the yardstick.

Which means the statement you made, properly formulated, is "We must differentiate between a christian's individual action and an individual action as a valid expression of the things I approve of to draw valid conclusions."

That's not very compelling. Sans the presupposition that your specific interpretation is the only valid one, which as an atheist I obviously am sans that, there's no specific reason encapsulated in that statement that would make me care about what you think about your religion. Your thoughts are, surprisingly, not the same thing as your religion, and without a non-question begging argument as to why I should take your opinion on what counts as a valid expression of christianity seriously, I have no reason to ascribe any power to your attempt to dull the misbehavior of christians.

Even if I did, we're still left with a situation where the supposed source of all morality, that's intended to make people godly and well behaved and so on, has no power to actually do so. "No true christian would do X!" you say, to which I would simply reply that apparently christian morality does not prevent even the people who believe it from doing X, so what's the point of it?