You have proved my original point.
Supersessionism It is a fancy word for replacement theology. The idea started around the first century when the Church started gaining more Gentile than Jewish believers. It sprung from the Gentiles wanting to totally separate the Christians beliefs from Jewish beliefs. God said the Jews are His Chosen People. With the desire to make the church Gentile, not Jewish God’s choosing became a problem. To “fix” this problem replacement theology was developed. It is not at all Biblical or biblically supported. God is very clear neither He nor His Word change. Jesus made the same point more than once.
Gnosticism is a heresy that has been vexing the Christian church since its earliest days. While many see it as an ancient heresy Gnostic beliefs and philosophies are still operating, somewhat under the surface, in the Church of God today.
Gnosticism in the Church Today
It is very difficult to define which churches or denominations are considered gnostic since the heresy has permeated Christianity since early in church history. The basic belief of Gnostics is a dualism, that material is evil but spirit is perfect. This is in direct opposition to Genesis 1:31; Deuteronomy 6:4; Mark 12:29; Luke 16:17; John 8:18 and John 10:30.
“Gnosticism was perhaps the most dangerous heresy that threatened the early church during the first three centuries. Influenced by such philosophers as Plato, Gnosticism is based on two false premises. First, it espouses a dualism regarding spirit and matter. Gnostics assert that matter is inherently evil and spirit is good. As a result of this presupposition, Gnostics believe anything done in the body, even the grossest sin, has no meaning because real life exists in the spirit realm only.” What is Christian Gnosticism? | GotQuestions.org
Because of their belief in dualism, they did not look upon the world as having been created perfectly and then having degenerated as a result of the sin of Adam and Eve. Rather the world was seen as being evil at the time of its origin, because it had been created by an inferior God.” http://www.religioustolerance.org/gnostic2.htm
While there are churches that acknowledge they are founded on Gnosticism there are many other churches that practice gnostic beliefs while stating they are purely Christian and follow only the Bible. Identifying the gnostic thinking behind church theology and doctrine can be difficult. Gnosticism is a chameleon and changes outward appearance to match the social wants and correctness of the times.
One example is dividing God’s Word into “Old” and “New” testaments. Old implies passe’, past it’s time, outdated. This is totally against the words of Jesus when He said, “For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.” (Matthew 5:18) It is also an expression of dualism that has crept into the church and, over time, has gained acceptance and its origin in the dualism of Gnosticism forgotten.
Another example of Gnosticism is how many people ask a blessing on their food. Often people say please bless and/or sanctify the food. To sanctify means to make holy and fit for use. The implication is the food, material item, is evil and needs to be made holy or clean before eating. This is really saying God created material things as evil and unclean. God does no such thing. God created, looked at His creation and said it was “good.” The food is already good for use, clean, and we should thank God for making it good from the beginning. To say that what God created is not good is to “assert that matter is inherently evil,” a very Gnostic belief.
The thinking of some people that God in the Old Testament is judgmental and the law as a means to punish people. This again is a very Gnostic thought. The Gnostic thinking is that YHWH, the god of the Old Testament was evil and inferior to Christ, the God of the New Testament. They did not see Jesus as part of the Trinity, a part of YHWH. (John 10:30; 16:26 disproves this idea.)) , the impressions and even phantasmagorias of vivid imaginations.1 To many, if not most, people, God is imagined as an angry, scowling, superannuated man with a flowing white beard. Seldom is God portrayed as a vivacious lover filled with kindness and mercy (Theomorphic Humanity pg 11) Although this thinking lays below the surface it does manifest itself in how some Christians and some Christian churches act. We tend to focus on Christ and forget about of dismiss the Father. Jesus said to pray to the Father in His name (John 16:23-26), not to pray to Him in the Father’s name.
We often hear going to heaven, escaping this world, being emphasized. We must remember in Revelation it states there will be a new earth. We were formed from the earth and intended to inhabit the earth. As far as material things, God’s creation is not evil. We were formed from the dust of the earth and neither our bodies or other material things were created or made evil.
Finally, as far as which churches have Gnostic thought and practices in them that can only be determined by looking at their stated beliefs and practices. It requires study from each interested person. In addition we should look at our own beliefs and practices. God is One, YHWH is not divided. God is not dualistic. God is not evil nor does God change, nor is there more than one God. These all destroy the basis of Gnostic belief.
Supersessionism is the belief that Christianity is the fulfillment of Judaism, and therefore that Jews who deny that Jesus is the [Messiah] fall short of their calling as God’s Chosen people and have been replaced by Christianity.
Holy Bible, KJV, NRSV
There’s an inter-denominational network of churches in this area, which pushes what they call the “covering doctrine” very hard, sometimes hardest of all:
I think the skepticism of the trinity among Christians is at an all time high today. This has caused a new problem. For those who are leaving the concept of the trinity behind, the enemy has laid a very effective, and dangerous, trap. As they are freshly seeking a new understanding of the nature of God to fill the trinity void, a new teaching is supplied and has become very popular.
It is referred to as Father Only, or Father and Son Only, doctrine and it strips Christ of His deity. It declares that the Father alone is God and Christ is just His Son - a merely human son. In a sense, I find this even more of an abomination than the trinity (if the trinity is not Biblical) because at least Jesus is understood to be God within the trinity framework.
God’s love is conditional.
Or is it unconditional…
Which one is the heresy?