Christianity is easy (a step to extinction)

[Esquilax]

Obviously, you're not grasping what I'm trying to get across. I guess the readers can judge for themselves.

Oh, I get what you're saying just fine: you're saying that though "true christians" might stumble into sin they have the good sense to feel bad about it and attempt to rectify that, which is a statement that implies that every time you say someone isn't a true christian you A: know the contents of their mind in a way you simply couldn't, B: know their actions in response to the sin that led you to use that label in the first place, again in a way you couldn't possibly, and C: know that your particular spin on the bible is the correct one.

A and B should be clear enough, but C is part of a much larger issue, that being that there's another possibility here: it's entirely possible that the behavior you deem sinful is perfectly fine under the interpretation of scripture that the other guy, your untrue christian, has. At that point, it's just down to spin, since undoubtedly you both have immoral or inconvenient biblical ordinances that you just disregard; what constitutes a "true christian" is just whatever's convenient for the christian speaking at the time.