No, Snape's soul wasn't damaged, because Dumbledore had told Snape to kill him.
Answer: By killing Dumbledore his soul would be ripped apart (like when Voldemort makes horcruxes). It is not the fact that Dumbledore would die, but the fact that Malfoy was about to commit a crime - namely murder - that endangered his soul.
severus snape was killed by voldemort voldemort was killed by harry potter molly weasley killed bellatrix lestrange severus snape killed dumbledore (dumbledore asked snape to kill him as he was dying anyway and so it wouldnt damage damage malfoys soul) fred weasley was killed, and so were lupin+tonks and many other in the great battle of hogwarts.
Voldemort killed Harry in the Deathly Hallows. He was in Limbo where he saw Dumbledore, Dumbledore explained some things to Harry there. He chose to return and finish the war. So in short: Voldemort killed Harry therefore destroying the Horcrux in Harry.
Snape killed Dumbledore because: 1. Dumbledore was already dying. 2. Dumbledore asked Snape to kill him. 3. If Snape didn't kill Dumbledore, Draco would have had to and Dumbledore didn't want Draco's soul ripped apart on his behalf. 4. Snape made an Unbreakable Vow with Narcissa Malfoy that he would kill Dumbledore if Draco failed to do so. 5. It would land Snape firmly in Voldemort's good books so that Hogwarts would be under the control of Snape and not the Carrows. 6. If J.K. Rowling hadn't killed Dumbledore somehow, the final battle would be postponed for too long.
Dumbledore asked Snape to kill Dumbledore. Over the summer between the 5th and 6th books, Dumbledore went looking for the ring Voldemort had stolen from his grandfather Marvolo Gaunt (well, actually, he stole it from his uncle Morfin Gaunt, who inherited it after Marvolo died), and which had originally belonged to Salazar Slytherin. Voldemort had made the ring into a Horcrux and put a curse on it. What Voldemort didn't know was that the black stone in the ring was actually one of the Deathly Hallows -- the Resurrection Stone. Dumbledore had never gotten over the death of his baby sister Ariana, who was killed by a spell during the fight Dumbledore's brother Aberforth had with Dumbledore's friend, Gellert Grindelwald. Even though he knew the ring was probably cursed, he just couldn't resist touching the stone, because he wanted to see his sister again so badly. Dumbledore immediately found Snape, and Snape was able to contain the curse in Dumbledore's hand. If Snape hadn't done this in time, the curse would have spread to the rest of Dumbledore's body and killed him fairly quickly. But even though Snape was able to contain the curse, Dumbledore was still doomed: he had only about a year to live. So, since Voldemort was already planning to make Draco Malfoy kill Dumbledore, Dumbledore decided to ask Snape to kill him instead. Dumbledore knew that Voldemort didn't really expect Draco to succeed at killing him; Draco's parents had fallen out of favor with Voldemort, and Voldemort just wanted to heap more misery onto the family, by making them watch their son fail at the task and be killed for it. And even if Draco was able to kill him, Dumbledore didn't want Draco's soul to be damaged by murder. Also, if Snape killed Dumbledore, it would seemingly prove his loyalty to Voldemort, and ensure his continuing worth as an adept and loyal Death Eater.
dumbeldore is dead so he cannot return but when harry half dies he meets dumbledore's soul and he talks to him but he does not come back
Albus Dumbledore wanted to be killed for a first reasons.The first, was that Lord Voldemort had tasked Draco Malfoy with killing him and Dumbledore didn't want Draco's soul to be ruined. Dumbledore also hoped to die the Elder wands last master. If his death was arranged, the wand would not change allegiance.Also, when he put on Marvolo Gaunt's ring he cursed his hand. Severus Snape was able to contain the curse but told him that in a year, he would be dead.
This is a very broad question, and not worded correctly. Severus Snape killed Albus Dumbledore in the end of the sixth book. Dumbledore had asked Snape to kill him, to save Draco Malfoy's soul because of the Unbreakable Vow that Narcissa Malfoy made Snape take in the beginning of the sixth book since Voldemort had ordered Draco to kill Dumbledore.
It was the part of Voldemort's soul that was inside Harry Potter.
That was right after Harry found out, using Snape's memories, that he was the 7th Horcrux of Voldemort, which was accidental. While Harry is with Dumbledore, Harry asks if they should help the baby, and Dumbledore told him that it can't be helped. That baby was what would be left of Voldemort. When Harry died, the part of Voldemort's soul that was in Harry also died. Therefore, that baby was a representation of Voldemort's dying soul. JK Rowling later tells everyone that after Voldemort was finally killed, he was that same old, suffering baby that no one could help.
Albus Dumbledore, who was killed by Severus Snape.It is later revealed that his death was arranged between the two so that Dumbledore would die the last true master of the Elder wand and Draco Malfoy wouldn't destroy his soul by killing. The first part of the plan didn't work, as Draco disarmed Dumbledore shortly before his death. In doing so, he became the master of the Elder wand.
Dumbledore put a cursed ring on his hand which would have killed him had Snape not stopped it. Snape told Dumbledore he only had about a year left to live and Dumbledore knew that Voldemort was plotting his death but didn't want Draco Malfoy's soul to be damaged by this. He also knew that Voldemort would want the Elder wand and that Snape needed to keep convincing Voldemort he was on his side. So, Dumbledore told Snape to kill him which meant Voldemort trusted him, Draco kept his soul intact and Dumbledore died as the last true owner of the Elder wand - although because Draco disarmed him before he died that part of the plan didn't work. Also because Dumbledore says that he would rather be killed by Snape than one of the other Death-Eaters, such as Belatrix Lestrange who, as Dumbledore put it 'like to play with their food'. Snape also made an unbreakable vow to Narcissa (or Cissy) Malfoy, to help Draco in his deed set by 'The Dark Lord', and if it should seem Draco would fail, he commit the deed himself. (The deed being to kill Albus Dumbledore)