The "good news" ABOUT the Christ
This is the message ABOUT the priceless ransom price Jesus paid to secure a victory over religion, and to secure the release of God's children in the greatest legal custody battle ever (between our heavenly father and our evil step-father satan the devil the author of religion). This message has three main parts: "the message of salvation", "the message of reconciliation" (or atonement, or at-one-ment), and the "message of deliverance" (or spiritual liberation). Some further key ingredients of this victory message are the many priceless free gifts available to any that would receive them as such: IMPUTED righteousness, IMPUTED holiness, IMPUTED sinlessness, IMPUTED perfection, IMPUTED sonship (adoption back into God's family).
The "good news" ABOUT the Kingdom
This is the message ABOUT God's eternal, victorious and "redemptive rule, reign and authority over those redeemed by Christ". (Paraphrased from Greg Gilbert's definition of the Kingdom in his groundbreaking 2010 book "What is the gospel"). The Kingdom has present and future spiritual and physical dimensions which religionists are unable to discern.
It does not take much to see why this message is scandalous to religionists, how it undermines their opposing kingdom and power base, and why there is nothing they secretly fear and loathe more. Just imagine the "dumb sheeple" being given as "free gifts" that which the ruling religious clergy class demands they work hard for! Scandalous! Enough to make the "gnat straining" and "camel gulping" Pharisees choke with fear and rage. It is the reason they killed Jesus, and to this day hound any "contaminated" with this message.
The unabridged gospel of grace (unmerited favour) was at the heart of "Franzgate 1980" and the Brooklyn Bethel witch-hunt to eradicate it.
At the heart of the struggle (or legal custody battle) is a gigantic conflict of interest. Legalistic, authoritarian, bureaucratic, reductionist, inane, attrition prone rule by man, versus freedom of the sons of God who are organically, semi-autonomously and invisibly led by conscience, faith, spirituality, and Holy Spirit to much higher levels of consciousness and outcomes.