Because the plain reading of the text says it was a snake. It was you and others that tried to make it figurative by citing the verse that says it was Satan. I simply made the case that this is not evidence for or against the literalness of the snake by pointed to an example of where Christ refers to literal Peter as Satan. The burden is on you to show that the snake must be figurative based on the verse in revelation. If you can't, then we must conclude it was a real snake incited by Satan.
Where do you get the idea that 'real snake incited by Satan' is some kind of default setting you can claim if you don't want to listen to what scripture says? I have shown how 'Peter incited by Satan' is a poor analogy, not even clear in the passage about Peter. How does that get to be the default interpretation?
Of course the plain text says it was a snake. The plain text in parables always describes things that sound literal. The plain text in the parable of the sower says the seed was eaten by literal birds. The plain text in the parable of the Good Shepherd says Jesus literally did work minding sheep.
And it is not simply one verse in Revelation. I quoted two verses, and if you look at the context, the dragon is a major character in the book of Revelation found in chapters 12, 13 and 20 as well as a mention in ch 16. In fact there is more about the serpent in the book of Revelation than there is in Genesis. The dragon is referred to twice as 'the ancient serpent' and in another two verses simply as 'the serpent'. We are told the ancient serpent is not only
called the devil and Satan and that he
is the devil and Satan. If there were any uncertainty who the ancient serpent meant, we are told he is the one who deceived the whole world.
Not only that, but when the angel is throwing the dragon into the pit for a thousand years we are given a description of 'the dragon that ancient serpent who is the devil and Satan' and we are told the angel threw
him into the pit. Rev 20:1 T
hen I saw an angel coming down from heaven, holding in his hand the key to the bottomless pit and a great chain. 2 And he seized the dragon, that ancient serpent, who is the devil and Satan, and bound him for a thousand years, 3 and threw him into the pit, and shut it and sealed it over him, so that he might not deceive the nations any longer, until the thousand years were ended. After that he must be released for a little while. The angel did not throw a serpent
and Satan into the pit, we are told five times in the short passage that the ancient serpent and Satan are a single person, 'him'. Nor was it simply a serpent who had been incited by Satan. After the thousand years, though it was the ancient serpent who was thrown into the pit for a thousand years, we are told it is Satan who gets released Rev 20:7
And when the thousand years are ended, Satan will be released from his prison. The ancient serpent
is Satan.
Nor is it only the book of Revelation, Ezekiel took the description of a serpent in Eden and interpreted it as an angel encrusted in jewels who is thrown to the ground for his iniquity.
Psalm 78 sees the serpent's head being bruised, not as an actual snake, but as a battle God fought against the powers of Egypt when the Israelites escaped across the Red Sea. Psalm 74:13
You divided the sea by your might; you broke the heads of the dragons in the waters. 14 You crushed the heads of Leviathan; you gave him as food for the creatures of the wilderness.
We find the same thing in Isaiah, God's battle with a non literal serpent/dragon during the Exodus, Isaiah 51:9
Awake, awake, put on strength, O arm of the LORD; awake, as in days of old, the generations of long ago. Was it not you who cut Rahab in pieces, that pierced the dragon? 10 Was it not you who dried up the sea, the waters of the great deep, who made the depths of the sea a way for the redeemed to pass over? As well as the promise a future fulfilment, Isaiah 27:1
In that day the LORD with his hard and great and strong sword will punish Leviathan the fleeing serpent, Leviathan the twisting serpent, and he will slay the dragon that is in the sea.
And of course Jesus himself showed us how the serpent wasn't literal, when instead of stepping on a 4,000 year old snake at Calvary, he defeated the power of Satan and cast down the ruler of this world John 12:31
Now is the judgment of this world; now will the ruler of this world be cast out.
And what verses do you have to support your default interpretation the snake was incited by Satan? Just the weak analogy that Jesus once referred to Peter as Satan, which you think meant Peter was incited by Satan.