To reject Christ is the only unforgiveable sin”
Then many here seem to reject God by rejecting His Word and rejecting His Church.
Nope. It's about Christ.
He never said, "come follow Me and my church." It's about Him and Him alone.
Matthew 28
18* g Then Jesus approached and said to them, “All power in heaven and on earth has been given to me. 19h Go, therefore,* and make disciples of all nations, baptizing them in the name of the Father, and of the Son, and of the holy Spirit, 20i teaching them to observe all that I have commanded you.* And behold, I am with you always, until the end of the age.”
The Fathers do affirm the inherent danger in deliberately rejecting the Church. For example, St. Ignatius of Antioch wrote at the turn of the second century, “Be not deceived, my brethren; if anyone follows a maker of schism, he does not inherit the kingdom of God” (Letter to the Philadelphians 3:3). In the third century, St. Cyprian of Carthage wrote, “whoever is separated from the Church and is joined to an adulteress [a schismatic church] is separated from the promises of the Church, nor will he that forsakes the Church of Christ attain to the rewards of Christ. He is an alien, a worldling, and an enemy” (The Unity of the Catholic Church 6, 1). In the fourth century, St. Jerome wrote, “Heretics bring sentence upon themselves since they by their own choice withdraw from the Church, a withdrawal which, since they are aware of it, constitutes damnation” (Commentary on Titus 3:10-11).