I think you are saying that truth is truth no matter the source.
without considering if that's what they meant or not,
as yahshua says 'what is born of the flesh, is flesh, and profits nothing' is just a bit of torah/ scripture
that
shows
that the source of something matters. the father of lies fills the heretical churches with lies, and no truth, no life.
the source of something , like a seed, determines if life or death proceeds/ results.
this is especially prominently evident in music - for one example of many - and since there are far far more demons
and doctrines of demons on earth than is realized by people of the earth, there is far far more death resulting....
as it is written also 'for lack of (experiential) knowledge (of truth), my(yahweh's) people perish' ....
another example is the heresy RoboOp and all the admins recognized long ago, as is and always was recognized by the
reformers some time ago - no good thing, no salvation, not one truth, comes through nor from the heresy - it is not
proper not reasonable(in yahweh's view) not appropriate for true believers to try to have 'dialogue' with satan in such
cases, but rather as it is written expose him. otherwise death instead of life is fed and increases. yahshua never never never says to 'entertain demonic doctrines' nor 'any other gospel' (i.e. heresy).... but rather have nothing to do with that nor with those delivering and deceived by that.(too many 'little ones' are lost by such deceived thinking and actions - literally billions of souls are lost to the enemy of christ by or through or because of heresy - it is not to be toyed with)....