I was simply replying to TwinCrier's citation of the passage in Acts and saying that I don't think it can be used the way he wants to use it.
Romans 13:1-7
1Everyone must submit himself to the governing authorities, for there is no authority except that which God has established. The authorities that exist have been established by God. 2Consequently, he who rebels against the authority is rebelling against what God has instituted, and those who do so will bring judgment on themselves. 3For rulers hold no terror for those who do right, but for those who do wrong. Do you want to be free from fear of the one in authority? Then do what is right and he will commend you. 4For he is God's servant to do you good. But if you do wrong, be afraid, for he does not bear the sword for nothing. He is God's servant, an agent of wrath to bring punishment on the wrongdoer. 5Therefore, it is necessary to submit to the authorities, not only because of possible punishment but also because of conscience. 6This is also why you pay taxes, for the authorities are God's servants, who give their full time to governing. 7Give everyone what you owe him: If you owe taxes, pay taxes; if revenue, then revenue; if respect, then respect; if honor, then honor. (NIV)
The main point here seems to be that Christians should obey the govt. Naturally Paul phrases it terms of the govt. in force at that time, which as it happens did use the death penalty.
The passage doesn't say all governments must inflict the death penalty. Since we have prisons which are more secure than anything that was available then, i don't see that the death penalty is necessary these days. There may be situations I haven't thought of where the death penalty might prove to be necessary, so I'm quite ok for it to be kept in reserve but rarely if ever used rather than outright abolished.