Only Calvinists who are flatly ignorant of Calvinist doctrine fail to charge God with this sort of injustice.
It isn't merely that Calvinism teaches that God sends people to Hell before they've done anything to deserve it, it teaches that God did so for no reason at all other than that it pleased Him to do so.
Calvin's own words state it most clearly...
“God is moved to mercy for no other reason but that he wills to be merciful.” (John Calvin, Institutes of Christian Religion, Book 3, Chapter 22, Paragraph 8)
“Therefore, those whom God passes over, he condemns; and this he does for no other reason than that he wills to exclude them from the inheritance which he predestines for his own children.” (John Calvin, Institutes of Christia/n Religion, Book 3, Chapter 23, Paragraph 1)
“We cannot assign any reason for his bestowing mercy on his people, but just as it so pleases him, neither can we have any reason for his reprobating others but his will.” (John Calvin, Institutes of Christian Religion, Book 3, Chapter 22, Paragraph 11)
"All are not created on equal terms, but some are preordained to eternal life, others to eternal damnation; and, accordingly, as each has been created for one or other of these ends, we say that he has been predestinated to life or to death. (John Calvin, Institutes of Christian Religion Book 5, Chapter 21, paragraph 5)
As for the bible. It obviously does NOT teach this foolishness about God. What the Bible does teach about God is the He is righteous and that His judgements are just. The only way to get Calvinism out of the text of Scripture is to bring the doctrine to the text. The above two posts stand as an excellent example of exactly that. The entire system is one huge example of biblical eisegesis.
Here's the bottom line.
The bible teaches that God is just. That much is not in dispute. We can, therefore, say that either Calvinism is false or the bible is false. If the bible is false then the whole of Christianity, including Calvinism, is false. Either way, Calvinism is false. Calvinism cannot survive the simple notion that God is just.
Resting in Him,
Clete