Seemed to me the point was that it’s a logical fallacy to make the ad hoc generalization that no true Christian would go to war.
en.wikipedia.org/wiki/No_true_Scotsman
While that may be true, it is equally correct to point out that when the No True Scotsman fallacy is invoked in an argument, it is typically invoked by those who balk at clearly defining what a “Scotsman” is in the first place. Ergo, you are damned if you do AND damned if you don’t.
Would a “true” shark ever be a filter feeder surviving on plankton? Well, that depends upon how “shark” is defined, I suppose. When a scientifically precise definition of “shark” exists, clearly sharks need not be sharp-toothed killers of the deep. The No True Shark fallacy cannot be invoked in this instance BECAUSE a well-developed and precise definition of shark exists. The ONLY reason that the No True Scotsman fallacy is a fallacy is because the one invoking it does not permit a well-defined definition of “Scotsman.” If they did, the fallacy wouldn’t exist.
Same with no true Christian. My guess is that anyone who invokes No True Christian in order to call out what they say is a fallacious claim will not permit the word “Christian” to be well-defined in the first place. They will argue against any definition in order to appeal to the No True Scotsman fallacy to dismiss any claim they don’t like with reference to Christians.
I recently listened to Richard Carrier attempting to argue that Hitler was a specific kind of neo-Christian even though he didn’t accept the divinity of Christ and rejected pretty much everything else Christianity teaches. When it was pointed out by Richard Weikart that Muslims, too, believe what Hitler believed about Christ and, therefore, by Carrier’s method of determining who can be identified as Christians, Muslims would be. He never got the point. He simply argued that Seventh Day Adventists, Jehovah’s Witnesses and Mormons had similar beliefs as Hitler about Christ and he, Carrier, would classify them as “Christians.”
The point being that if we are going to be sloppy with regard to defining the meaning of words, everything and anything we have to say will just be one big fallacy. It starts with the refusal by would-be discussers to be precise, which is why philosophy is the art of making distinctions.
Before we make any claims about “true” Christians, we need to arrive at a proper definition of what it means to be “Christian” in the first place. Absent that, nothing we have to say will be worth discussing.