If we all come from Adam and Eve.

Was incest allowed and then not allowed?
Did Adam, Noah, Abraham or Jacob observe Festivals of Unleavened Bread, Harvest and Ingathering?
Were Noah and his sons circumcised?

Since no one is answering........

In the fallen world, we know sexual intercourse including incest was the way to multiply.
We also know that in the fallen world a perfect human being was born not of natural descent, nor of human decision or a husband’s will, but of God.

The festivals - they were the shadows (types) of things to come. Here's a good, although not necessarily all true, read:
http://www.biblicalperspectives.com/books/festivals_2/1.html

Was incest allowed and then not allowed?
I think so, otherwise Eve is not the mother of all living.

Did Adam, Noah, Abraham or Jacob observe Festivals of Unleavened Bread, Harvest and Ingathering?
No reason to think they did because they were first given to Israelites.

Were Noah and his sons circumcised?
Don't think so because it was introduced to Abraham.

Does Yahweh change?

Must man reproduce by flesh?

Are the sons of the second Adam required to observe the feasts and to circumcise in the flesh?

Does Yahweh change?
I don't think his character changes, but he has given different instructions to different people.

Must man reproduce by flesh?
?
Must Eric say things with a question?

Are the sons of the second Adam required to observe the feasts and to circumcise in the flesh?
If not, when did it stop and why? Will the rest of the feasts be fulfilled at a time when they are no longer observed? The feasts were given together. I don't see where it says to keep the feasts only until they are fulfilled.

Different instructions to different people - some call this Dispensationalism.
Regardless, if different instructions to different people is correct teaching, wasn't the Passover for Jews and the commemoration of the last supper for new covenant believers?

The feasts were given together with various regulations for worship and to carry out at an earthly sanctuary. Is there instruction for gentile believers to observe them partially?

Was there an instruction for incest in order to reproduce?
Was incest not a sin and become a sin?

boyscout wrote:

Regardless, if different instructions to different people is correct teaching, wasn't the Passover for Jews and the commemoration of the last supper for new covenant believers?

Gentiles can believe and become part of spiritual Israel precisely as a result of what the passover represents, so that seems pretty meaningful to me and more significant than Israel coming out of Egypt. What do you think?

boyscout wrote:

The feasts were given together with various regulations for worship and to carry out at an earthly sanctuary. Is there instruction for gentile believers to observe them partially?

Sacrifices were replaced by one sacrifice for all. Daniel could not be where he wants to be to keep the law, but he probably fulfilled the requirements of the law. So maybe there are laws that cannot be applied due to the circumstances, but gentiles can and should fulfill the requirements/meaning of the law. What do you think?

boyscout wrote:

Was there an instruction for incest in order to reproduce?
Was incest not a sin and become a sin?

How did they reproduce otherwise? You seem to know another way.
Gen 20:12, Lev 18:9 - either Abraham sinned or it was not yet a sin.

I am just asking questions.
Is the new covenant the realization of the Passover and was made with 12 Jews at the last supper and when would they do from that night on regarding Passover? Do they continue to do on the yearly Passover to commemorate or as often as Paul taught in 1 Corinthians 11:25?
The Jews situation in Daniel's time was probably very similar to ours but the book didn't give us any detail on how to observe. On the other hand, I find it interesting that both Isaiah and Jeremiah put emphasis on Sabbath but not on other feasts.
Reproduction - I was only asking questions.
Is the new heavens and new earth the millennium in Isaiah 65:17-25? Will there be new born then?
Did Yeshua say "at the resurrection people will neither marry nor be given in marriage; they will be like the angels in heaven?"
Regarding Abraham, and the murder of Abel for that matter - were they sins which He overlooked because of men's ignorance and because the law was not given?

boyscout wrote:

I am just asking questions.

I know. I can see that you are asking lots of questions.

boyscout wrote:

Is the new covenant the realization of the Passover and was made with 12 Jews at the last supper and when would they do from that night on regarding Passover? Do they continue to do on the yearly Passover to commemorate or as often as Paul taught in 1 Corinthians 11:25?

There is no indication Paul did not celebrate the feast. Acts 18:21 and 1Cor 5:8 - he was writing to an audience that is aware of the feast and is interested in keeping the feast.

I don't see why they can't do both.

boyscout wrote:

The Jews situation in Daniel's time was probably very similar to ours but the book didn't give us any detail on how to observe. On the other hand, I find it interesting that both Isaiah and Jeremiah put emphasis on Sabbath but not on other feasts.

OK, but they don't argue against keeping the feasts. Perhaps the sabbath is a much better indicator of obedience because it is once a week instead of once a year. Zechariah mentioned one of the feasts.

To put it another way, what is the reason for not keeping the feasts? There is not much in this world that is as important or powerful as those days, which contain hidden secrets from the almighty god. From creation until now, there is probably no event more important than those represented by the sabbath and the feasts.

boyscout wrote:

Is the new heavens and new earth the millennium in Isaiah 65:17-25? Will there be new born then?
Did Yeshua say "at the resurrection people will neither marry nor be given in marriage; they will be like the angels in heaven?"

I'm not following. Can you explain?
I always assumed the new heavens and new earth would not have newborn - at least not reproduction.

boyscout wrote:

Regarding Abraham, and the murder of Abel for that matter - were they sins which He overlooked because of men's ignorance and because the law was not given?

It is obvious Cain's murder of Abel was considered a sin, but no indication that Abraham sinned. Without knowing anything about dispensationalism or what others are saying, from just reading the bible, I would think incest was not a sin in Genesis because of Gen 1:28, Gen 3:20, Gen 20:12.

What do you think?

Feasts - let's skip the did they or didn't they, move on to should we or should we not and advance to the how. I guess whoever's convinced should lead for the excuses for not keeping are plenty and not understanding being the number one and no one else is doing comes second.

Reproduction - Isaiah 65:17-25 seems to suggest there will be.

Dispensationalism - something not a sin becomes a sin at some point in time or vise versa is what they believe and how they explain the feasts away. Or worse, replacement theology. Thus I'd rather go the "innocent" or "ignorant" route to explain when it comes to incest.