Challenge to Definite Atonement?

I believe in the Biblical doctrine of the church "Definite Atonement" [also called Limited Atonement]. If you want to know, why ask me sometime:)

Basically this doctrine states that Jesus Christ died for the sins of anyone whom He chooses to bring into His family. Jesus died for the sins of those who have ever and will ever come into a saving relationship with Him. Not everyone that has ever lived. What do you think?

Anyhow, in the meantime of believing in this doctrine, how should we understand these passages? How would you respond to someone who brought up these passages challenging the doctrine of "Definite Atonement?"

(1) John 3:16

“For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life. [ESV]"

(2) 2 Peter 3:9

"The Lord is not slow to fulfill his promise as some count slowness, but is patient toward you, not wishing that any should perish, but that all should reach repentance. [ESV]"

(3) Romans 14:15

"For if your brother is grieved by what you eat, you are no longer walking in love. By what you eat, do not destroy the one for whom Christ died. [ESV]"

(4) 1 Corinthians 8:11

"And so by your knowledge this weak person is destroyed, the brother for whom Christ died. [ESV]"

(5) Hebrews 10:29

"How much worse punishment, do you think, will be deserved by the one who has spurned the Son of God, and , andhas profaned the blood of the covenant by which he was sanctified has outraged the Spirit of grace? [ESV]"

(6) 2 Peter 2:1

"But false prophets also arose among the people, just as there will be false teachers among you, who will secretly bring in destructive heresies, even denying the Master who bought them, bringing upon themselves swift destruction. [ESV]"

(7) Isaiah 53:6

"All we like sheep have gone astray;
we have turned every one to his own way;
and the Lord has laid on him
the iniquity of us all. [ESV]"

(8) Romans 5:8

"but God shows his love for us in that while we were still sinners, Christ died for us. [ESV]"

And how do we handle all the other "all," "everyone," "world," "whosoever," passages?

I have some ideas, but I wanted to stir some minds out there before I deal with this on the blog or in my paper.

In Christ
Noah