Deuteronomy 12:31 You must not worship the LORD your God in their way, because in worshiping their gods, they do all kinds of detestable things the LORD hates. They even burn their sons and daughters in the fire as sacrifices to their gods.
Above verse states very clearly that god does not want human sacrifice. Why would god change his mind and accept the sacrifice of Jesus? Since god does not change his purpose, why should god change his purpose and make himself a liar?
Deut 24:16, Exodus 32:30-35, Ezekiel 18 are very clear in that no one can substitute for the sins of other person. Again, if god changed his mind, how could anyone believe a single word of the bible since the god is a fickle god.
Deut 6:4, Isaiah 45:18, Isaiah 45:22 are verses that explicitly state that "god is one". Why do so many verses emphasise that god is one (and not more, like Trinity)? Who should you believe? God's 'divine' words from the OT or fabricated assertion by post-Jesus writers who made up the concept of Trinity? Again, if believers claim that these verses are false, they are in fact claiming that the bible is false!
Matthew 5:17-18 "Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them. I tell you the truth, until heaven and earth disappear, not the smallest letter, not the least stroke of a pen, will by any means disappear from the Law until everything is accomplished.
Matthew's gospel was supposedly the words of Jesus. Was Jesus lying, when he quoted those verses?
Why do Christians not follow the Law, when the above verses are so clear that nothing should be changed to the Law?
If Jesus is god, what could be achieved by god (Jesus) sacrificing god (himself) to pay god for mankind's sins? The same entity sacrificing to the same entity achieved nothing and is an absurd logic.