Jesus did not regard equally with God something that man would grasp, so He didn't push the issue. Many people who believed in Him, the Messiah and Savior still did not grasp His deity, yet believed what He said. They beleived He died for their sins and rose on the third day. And that He was God's Son. The depth of understanding of His nature wasn't a prerequisite. I am not sure it is now, though 98% of Christians believe this. We cannot judge Non-trinitarians or anyone. We cannot put them in the group whom only God knows are reprobate. God is the judge.
I would be careful not to condemn anyone. My father was a professed atheist until close to death.
My mother was a rebellious liberal person on the fringe of her own spiritual smorgasbord of beliefs. I had chipped away at those beliefs for 30 years and almost gave up hope ... until just days before her death when she confessed to believing that Jesus was always there for her and had his hand on her should. She was singing to us, "Jesus loves me ... "! So let's not condemn. We never know. Drug addicted murderers in prison come to faith in Christ. He is merciful.
I am just pointing to a scriptural fact, what the reader does with that fact is what judges them, not me. The blood of bulls and goats, or the blood of a man cannot redeem us at best it can only temporarily cover (atone) for our sins and is why the Old Testament sacrifices had to be repeated year after year, and why all religions that deny the blood of God fall into legalistic religion and self-righteous legalism, because they never experience the freedom from condemnation. (Romans 8:1-8)
I Once had a conversation with an SDA member about this being the big flaw in the doctrines of Ellen G White, she preached of the atonement for sin, Scripture speaks of the removal of sin. Atonement is just a covering for sin... not a removal of sin and the result always is that religious guilt and legalistic works dualism that all religions are built on. Christianity is not like that, God removes our sin, and we are free to obey Him and choose the path of holiness by yielding to the work of the Holy Spirit in us. (Ephesians 2:8-10)
You see, most of those people who are denying the blood of God, are condemning themselves already, because they do know what true redemption is like. My words are there to show them what they are missing in their understanding.