And the doctrine is error. God determined to give man free will and choice. He allows men to act independently, otherwise man could not be held respsonsible for rejecting the gospel. If God determines who is saved, then he also determines that a majority of men would die in unbelief. But this cannot be so because unbelief is a sin and God never tempts any man to sin.
James 1:13 Let no man say when he is tempted, I am tempted of God: for God cannot be tempted with evil, neither tempteth he any man:
14 But every man is tempted, when he is drawn away of his own lust, and enticed.
If Calvinism is true, God didn't just tempt man to unbelief, he DETERMINED their unbelief. Your doctrine teaches that God cursed man with the inability to believe, making God the root cause of unbelief and sin.