It means that there is true scriptural, Biblically moral things in these writings but has so much twisted lies mixed in that what does have truth in them warps what true things are in them and drowns out the true Christian stuff with a subtlety cleverly blended in Gnostic nuance that blasphemes God's character and sovereignty and suggests incorrect things about humanity that works on seasoned Christians with strong scripture rooting and strong reverence for God as God and hatred of sin and as awful as it is it truly works on you and will destroy people in time. Not all Calvinism but 5 point Calvinism interpreted to the extreme of each point in tulip. Limited atonement is heresy altogether and irresistible grace is also inaccurate plus 5 point doesn't truly teach total depravity but actually total inability and their interpretation of original sin isn't that we're all affected by the inclination to sin after the Fall but that we are equally guilty of Adam's sin. Critical race theory says all whites are born inherently racist. Compare that to their original sin interpretation. See the subtly collective nuance? Many read this stuff and they need to recognize the disgusting implications in here without being spellbound by God's sovereignty and their political stance. MacArthur, Piper, Washer etc say what many Christians have longed to here after liberals infiltrated most churches. 5 point Calvinism is finishing off those who rejected obvious heresies and it must be exposed.