You should know your doctrine better. Unconditional election is for salvation according to the Westminster Confession. But it is blatantly FALSE in that all of Israel -- every Jew -- was not unconditionally elected for salvation, when salvation is the ultimate goal of the Gospel.The OP speaks about unconditional election, not salvation.
According to TULIP, Limited Atonement leads to Unconditional Election, which leads to Irresistible Grace, which leads to the so-called "gift of faith".
So why was every Jew not given this Calvinistic treatment when there was absolutely every reason for them to be saved? Indeed eight solid reasons why every Jew should have been saved through irresistible grace.
Who are Israelites; to whom pertaineth [1] the adoption, and [2] the glory, and [3] the covenants, and [4] the giving of the law, and [5] the service of God, and [6] the promises; [7] Whose are the fathers, and [8] of whom as concerning the flesh Christ came, who is over all, God blessed for ever. Amen. (Rom 9:4,5)
And the answer should be obvious. But you won't give up your False Gospel. That would be traumatic.