Once again brings to mind the question of why you believe in the Catholic concept of a 'canon', and this entire thread once again:
https://vigilantcitizenforums.com/threads/if-the-vatican-is-the-antichrist-then-why-do-you-trust-the-bible.6419/
@Red Sky at Morning what you term "spiritual warfare" just isn't. You keep displaying the inability to understand that things have consequences. There are people out there that hate Christianity (I'm not one, although you love to put me in that box and make me dance for you), people that do are the result of many things. Once you narrow it down to such a misunderstood dichotomy of "they just deceived", you will denied the ability to have humility and to also rationally understand to yourself
why you are "not deceived".
A person, through proper study and prayer could indeed come to reject Christianity or maybe even God entirely. To you put it upon yourself to be a mini-Pope and Excommunicate that person claiming they 'were never a real Christian' etc. This is a common defense mechanism by your types but it goes nowhere. People do leave Christianity and they have their reasons.
Now, as I mentioned consequences, to diagnose people that are opposed to Christianity as 'deniers of the truth' or as 'working for the devil' or any other kind of rhetorical pejorative you Christians sling meaninglessly at everything, is denying accountability, and a religion needs to be able to own up for where it falls short.
Once you box yourself into solely an 'us vs them' construct, you have in reality, joined a cult of some kind. Your mind imprisons itself because it tries to immunize itself from being aware of things that cause critical thought, self-awareness, make it uncomfortable, or simply that you may be a person of weak faith who cannot face the idea of an "exChristian".
Spiritual warfare comes from a lot of things and many places you would not suspect. Now, as you may recall from Romans 8:28 "
And we know that in all things God works for the good of those who love him, who have been called according to his purpose.", do you believe this? Do you know what it means to 'love God'?
Now, along with that last point. Is "loving God" a belief thing, or an experience thing? if the former, we run into problems, and if the latter, then the very doctrine of the Trinity falls apart because there is no Trinity to 'know', only God and God-only.
If you are not able to ask questions, then we return back to Matthew 7:26.
Now, as for Matthew 7:15-20, could this indeed be those who claim to have the only true form of Christianity? (without rational justification of such a position). People who reject the Church and invent their own Christianity's while claiming to have the only true Christianity? (aka, you Protestants). Think over it, at least.
I will bless you, even though you curse me and I will wish you glad tidings, even though you persecute me.
Infinityloop