Why change the subject which was whether God made His word available to all generations. Noah had God's word available to him.
>>Amos is prophesying after the death of Jesus that the word of the Lord would be found on the earth.<<
Who told you that? God was talking to the Israelites. You can't take verses out of context. You ignored the previous verses especially verse 2.
Amos 8:2 What do you see, Amos? he asked. A basket of ripe fruit, I answered. Then the Lord said to me, The time is ripe for my people Israel; I will spare them no longer.
That doesn't include the New Testament ekklesia of Christ. God's word has been available to the ekklesia in ALL generations.
>>The point is, God didn't intervene on their behalf.<<
NO, the point is "was God's word available to them". And that answer to that is YES it was.
>>That by itself invalidates your belief in a "believe only" doctrine.<<
No, it doesn't. Do you totally not understand the indwelling of the Holy Spirit and it's affects?
>>Again, irony. There are no mean people in heaven<<
Matthew 23:33 "You serpents, you brood of vipers, how will you escape the sentence of hell?
In your estimation was Jesus being mean?