Since the Calvinist rely so much on Romans 9 to defend this doctrine perhaps we could look at this chapter together.
It is IMPOSSIBLE that God would elect some for salvation and condemn the majority to damnation. But that is precisely what Reformed Theology teaches. So the questions to ask Calvinists (which should be answered from Scripture) are these:
1. Are all human beings sinners by birth and by choice?
2. Knowing this did God have a plan of salvation for mankind even before creation?
3. Did that plan include the necessity of the Lamb of God taking away THE SIN OF THE WORLD?
4. Does the Bible say this or not :For God sent not his Son into the world to condemn the world; but that the world through him might be saved.?
5. Should that one statement by the Savior not be sufficient to NULLIFY unconditional election?