Faking a few documents to get back some cargo is hardly a deterrent to the USA, the Brits and the Swedes. This was political. It was sending a message. That is what terrorism and war is about. It's not about sending a stern letter, which it had already done twice to diplomats, including MI6. It was 'You had two warnings.'
This is exactly right. In international relations, the generally accepted rule is: two written warnings, then then the murder of 852 civilians.
And of course, the standard response when an enemy power murders 852 civilians is: nothing (other than helping the enemy cover up their crime).
This is such obvious stuff. Don't the rest of you understand how governments work?