This is ungodly thought that Paul anticipated and refuted in Romans 9. Romans 9 makes no sense unless God's election is just as the calvinist understands it.
God does not sin or cause sin, the scripture is clear on this as is every calvinistic confession.
Brother, with all due respect, Romans 9 is talking about the Israelites and Gentiles. God hardened their(Israellites) hearts due to continual rebellion towards Him, and He then turned to us, the Gentiles.
Romans 9
22 What if God, willing to shew his wrath, and to make his power known,
endured with much longsuffering the vessels of wrath fitted to destruction:
23 And that he might make known the riches of his glory on the vessels of mercy, which he had afore prepared unto glory,
24 Even us, whom he hath called, not of the Jews only,
but also of the Gentiles?
25 As he saith also in Osee, I will call them my people,
which were not my people; and her beloved,
which was not beloved.
26 And it shall come to pass, that in the place where it was said unto them, Ye are not my people;
there shall they be called the children of the living God.[/U]
We(Gentiles) were the "vessels of wrath fitted for destruction", even being referred to as dogs by the Jews. But when Jesus died, He tore down the middle wall of partition, so that now, there is no more Jew nor Greek, male nor female, but one Spirit. By this One Spirit, are we baptized into the One body, which is Jesus Christ the Lord.
Ephesians 2
11 Wherefore remember, that ye being in time past Gentiles in the flesh, who are called Uncircumcision by that which is called the Circumcision in the flesh made by hands;
12
That at that time ye were without Christ, being aliens from the commonwealth of Israel, and strangers from the covenants of promise, having no hope, and without God in the world:
13 But now in Christ Jesus ye who sometimes were far off
are made nigh by the blood of Christ.
14 For he is our peace, who hath made both one,
and hath broken down the middle wall of partition between us;
15 Having abolished in his flesh the enmity, even the law of commandments contained in ordinances; for to make in himself of twain one new man, so making peace;
16 And that he might reconcile both unto God in one body by the cross, having slain the enmity thereby:
17
And came and preached peace to you which were afar off, and to them that were nigh.
18 For through him
we both have access by one Spirit unto the Father.
19 Now therefore ye are no more strangers and foreigners,
but fellowcitizens with the saints, and of the household of God;
20 And are built upon the foundation of the apostles and prophets, Jesus Christ himself being the chief corner stone;
21 In whom all the building fitly framed together groweth unto an holy temple in the Lord:
22 In whom ye also are builded together for an habitation of God through the Spirit.
You see here, Apostle Paul is telling them how Jesus grafted in the Gentiles by His death, burial, and resurrection. Those who were/are nigh are the Jews(God's chosen{elect} people), and the Gentiles were the ones who were afar off. When the veil of the Temple rent in twain upon Jesus' death, it signified the ending of the Law, and the ushering in of a New(Grace) Covenant. Now, Jesus is drawing all unto Him, but not all will come. Jesus stated in John 12:32,
"If I be lifted up, I will draw all men unto me."