Objections to the Trinity are that it is not logical. Logic should not rule scripture. If it is from God, there will be things in it that are difficult to understand. Additionally, the fingerprints of God are seen all over creation. Time is past, present, and future.
Space is height, width, and depth.
Matter is solid, liquid, and gas. They error in denying the truth doctrine of the Trinity. Jesus is both God and man. The sinner is made righteous in God's eyes solely by the faith that the believer has in the sacrifice of Jesus on the cross. Our works play no part in salvation.