Sorry, yes. I was recalling it from memory and mixed the two up. My apologies. I meant the London Declaration.
You are selectively and misleadingly quoting it, and confusing the concepts of contraband, which can be pursued on the high seas, with blockades which much be in a defined area and apply equally to neutral vessels.
This is stated very clearly in the opening articles, so I don't know how you missed it.
Chapter 1, Article 5 of the London Declaration: [0]
"A blockade must be applied impartially to the ships of all nations."
Chapter 1, Article 7: [1]
"In circumstances of distress, acknowledged by an officer of the blockading force, a neutral vessel may enter a place under blockade and subsequently leave it, provided that she has neither discharged nor shipped any cargo there."
Chapter 1, Article 14: [2]
"The liability of a neutral vessel to capture for breach of blockade is contingent on her knowledge, actual or presumptive, of the blockade."
Chapter 1, Article 15: [3]
"Failing proof to the contrary, knowledge of the blockade is presumed if the vessel left a neutral port subsequently to the notification of the blockade to the Power to which such port belongs, provided that such notification was made in sufficient time."
Chapter 1, Article 17: [4]
"Neutral vessels may not be captured for breach of blockade except within the area of operations of the warships detailed to render the blockade effective."
I could go on. The only limitation on blockades with regard to neutral states is that they may not apply to neutral ports or coasts. [5]
Contraband, by contrast, is something that may be seized on the high seas or in the territorial waters of the belligerents, outside of a specific blockade zone:
Chapter II, Article 37: [6]
"A vessel carrying goods liable to capture as absolute or conditional contraband may be captured on the high seas or in the territorial waters of the belligerents throughout the whole of her voyage, even if she is to touch at a port of call before reaching the hostile destination."
So, as I said, you've taken a complex and nuanced topic, completely misunderstood it, and are loudly proclaiming that your take on it which advances a specific political point is the correct one. That pushback you're getting isn't people unwilling to accept reality, it's people trying to help you understand what the circumstances really were.
[0] https://ihl-databases.icrc.org/applic/ihl/ihl.nsf/Article.xs...
[1] https://ihl-databases.icrc.org/applic/ihl/ihl.nsf/Article.xs...
[2] https://ihl-databases.icrc.org/applic/ihl/ihl.nsf/Article.xs...
[3] https://ihl-databases.icrc.org/applic/ihl/ihl.nsf/Article.xs...
[4] https://ihl-databases.icrc.org/applic/ihl/ihl.nsf/Article.xs...
[5] https://ihl-databases.icrc.org/applic/ihl/ihl.nsf/Article.xs...
[6] https://ihl-databases.icrc.org/applic/ihl/ihl.nsf/Article.xs...