xblustar
As to your first point, about Adam and Eve being created on "two different days", it should be noted that these two chapters were written by two different authors, as implied by different names for God in the first two chapters of Genesis. Also, Adama and Eve had other children not listed in Genesis (particularly daughters, who are rarely listed in the Bible). Yes, as astonishing as it is, it appears that some sort of inter-marriage occurred at this point. As to that, I can not answer you, the time of Genesis is very different from the time of Christ, or the time now.
That still doesn't show who Cain feared. That doesn't show why there's a discrepancy in days. Even if it was written by two people, that doesn't explain why one said man, plural, was created after plants, and the other said man, singular, before.
xblustar
Your second point; true, most of the dietary laws and such are no longer followed by Christians.
And Christ made it so that those laws are no longer needed.
xblustar
Your third point is a bit off base. What other reason would there be for God to even consider destorying the city, if it was not drowning in sin?
It was drowning in sin. Just not homosexual sin. Inhospitality and rape are both sins.
xblustar
For the forth point, yes you are correct, however it is a two part answer, and you failed to highlight: "Even their women exchanged natural relations for unnatural ones. In the same way the men also abandoned natural relations with women and were inflamed with lust for one another."
Still lust there. Also, is it not true that Paul would have thought anything non-childbearing was unnatural due to his Jewish heritage, including masturbation? And it can be noted that this passage also probably refers to the mass public orgies that occured, which are quite unnatural.
xblustar
Also, your interpretating of 1 John 4:7-12 is creative, at best. If you look up the Greek words for love, you will see that the one used here refers to friendship. English has only one word for love.
The Greek word used there, to the best of my knowledge, is agape. Which is not the same as friendship, or philos, love. It says unconditional in the English translation, also suggesting agape.