You don't need to respond to that. I'm just hashing through it and getting a feel, trying to detect the author's waveform, sort of read the lines on their palm a little bit. That post was more of a note.I assume you're trying to conclude that the author contradicts himself. If so, that is not the case because the author differentiates between the God of the Bible and the god of Christianity, and testifies that modern Christianity is not a Biblical religion.
The book's author is expending a lot of energy to both suspend causality and also explain why Abel is blessed for offering an animal. I think that the extra energy is unnecessary. Cain and Abel are us. We all bear the mark of Cain. Are we not murderous upon occasion? How many times do the Jews say to forgive? 7 times or more. The mark of Cain is about learning to forgive. Cain fails to conquer the dragon in his heart and kills his brother. It isn't about hamburgers versus salad, and the gift Abel gives is superior to what Cain gives for reasons beyond the scope of what we are talking about (and that I myself need to look into I suppose).Cain and Abel's sacrifice: pp. 211, 229-230
Noah's sacrifice: pp. 269, 832-834
As for Noah's sacrifice I think the author is again striving too hard. The divine doesn't have a nose, but people do. The sacrifice is a covenant of peace, and that is what food is about. You eat with friends not enemies. The world previous to Noah is destroyed by violence. Violence above all is to be avoided, and in the covenant of Noah we are told that murder is wrong. We are not told that eating animals is. We are told that animals must not kill people, because people are better.
This author has a clear love for animals, and at the same time they want to use the Bible to spread vegetarianism. Its obvious that the Bible is not their main focus but vegetarianism and the duct tape in their arguments is plainly gray. In Christianity they could find room for vegetarianism, and there are Christians who don't believe in substitutionary atonement. If the Bible were their focus they'd know that. There is a possible vegetarian future possible but not in literal Biblical interpretations caustically applied to daily life. Literally speaking, Noah and his family eat the animal, and the LORD likes how it smells and there must be sacrifices forever for that reason. The argument that it is the 'Stench of death' is hard to accept -- laughable. Noah and his family eat the animals for sustenance.
The future we face is one where several major religions square off over the centuries. Only a few are dedicated to vegetarianism, and these already attempt to encourage vegetarianism everywhere. They look energetically for ways of doing that even to the extreme of looking for vegetarian interpretations in other religions. There are also people who naturally feel strongly about the lives of animals who are just born that way. I think the author is such a person and is projecting their love of animals onto a Bible that loves people more than animals.