Hamlet changes the letter going to the King of England to kill him when he gets there to say to kill the people who give you this letter,which were Rosencrantz and Guildenstern. So they were killed instead.
Rosencrantz and Guildenstern carried letters from Claudius instructing the English to kill Hamlet upon arrival. Hamlet opened the letters and forged new ones which said that the English should put Rosencrantz and Guildenstern to death instead.
he switches the out with letters that arrange for the deaths of Rosencrantz and Guildenstern.
They went to Denmark to deliver a note telling Denmark to ensure the death of Hamlet.
Hamlet is directly responsible for the deaths of five people and indirectly for another. The first person to die because of Hamlet's actions is Polonius, who Hamlet stabs in the mistaken belief that he is King Claudius. This indirectly causes Ophelia's death. Hamlet then kills, in succession, Rosencrantz, Guildenstern, Laertes and Claudius.
Hamlet fakes death warrants for Ros and Guil which are acted on by the King of England. Hamlet justifies this by saying that they were spies and got what they deserved, especially as this was the death which Claudius had planned for Hamlet with Ros and Guil's help. "They did make love to this employment" says Hamlet. Horatio is not wholly convinced, especially since R and G probably had no idea what their warrant said (it was sealed, remember). "So Rosencrantz and Guildenstern go to it" says Horatio, a bit disgusted by Hamlet's callousness.
Most noticeably when he arranges for Rosencrantz and Guildenstern's death when they were just the messengers. His anger at Ophelia, Gertrude and Polonius may also be seen as misplaced. It is Claudius who he should be angry with. Hamlet is angry with his mother, but his mother had no part in the death of Hamlet's father nor did she know that Claudius had killed him.
He plans to have them put to death instead of him.
True. Hamlet changed the king's orders to the English from "Kill Hamlet" to "Kill Rosencrantz and Guildenstern." He didn't have to do that; he could have changed the orders to "Give Hamlet some flowers".
In England where they have been sent to accompany Hamlet to his death.
he switches the out with letters that arrange for the deaths of Rosencrantz and Guildenstern.
Claudius sent with Rosencrantz and Guildenstern an order to the king of England to have Hamlet put to death. I assume this is the "murderous commission" you are talking about. Hamlet finds it and substitutes another which is worded just the same, except it is Rosencrantz and Guildenstern who are to be killed, not Hamlet.
They are. If they weren't, Hamlet wouldn't have sent them to their death. They had the opportunity to betray him when they were out of his sight. It seems the king didn't completely take them into his confidence, though, so perhaps their loyalty wasn't total.
Claudius plans to send Hamlet to England with Rosencrantz and Guildenstern bearing a secret death warrant.
Death toll in Hamlet: Polonius, Ophelia, Laertes, Hamlet, Gertrude, Claudius, Rosencrantz and Guildenstern. (8)
They went to Denmark to deliver a note telling Denmark to ensure the death of Hamlet.
Certainly not. They were not even in Elsinore until well after Hamlet was visited by the Ghost. Then they were "sent for" by Claudius to find out what was up with Hamlet.
Hamlet then substituted a forged letter ordering the English authorities to put Rosencrantz and Guildenstern to death, "no shriving time allowed".
hamlet switched the letters. so when the people of England opened it and read that they are to kill the person who gives them the letter. since hamlet switched the letters, rosencrantz and guildenstern die