Because he wanted control of the forest, and perhaps Scourge wanted to make an example of Tigerstar.
No. He does not.
no scourge does
No, Tigerstar does not kill Firestar in Omen of the Stars. Firestar dies under different circumstances unrelated to Tigerstar. Tigerstar's actions continue to affect the Clans, but he does not play a direct role in Firestar's death during Omen of the Stars.
Some say Tigerstar slashed his neck and others say who cares. Why does it matter?
Lionblaze listened to Tigerstar because he was manipulated by Tigerstar's cunning words and promises of power. Additionally, Tigerstar preyed on Lionblaze's insecurities and desire to prove himself, which made him vulnerable to manipulation. Ultimately, Lionblaze realized his mistake and chose to stand against Tigerstar to protect his family and Clan.
in the darkest hour, he was captured along with featherpaw and strompaw ( later feathertail and stormfur ), and tigerstar told stonefur to kill featherpaw and stormpaw. he said no ( because stormpaw was his apprentice and featherpaw was his sister's apprentice ), and then tigerstar told darkstripe to kill stonefur. darkstripe didnt die, but he couldn't kill him. then tigerstar sent blackfoot, ( tigerstar's deputy ) to help darkstripe kill stonefur. together, darkstripe and blackfoot killed stonefur.
Yes, Tigerstar killed Brindleface in the fifth book "A Dangerous Path". Tigerstar used Brindleface's dead body to lure the pack of dogs toward the ThunderClan camp, where they can destroy the camp and kill the Clan cats, especially Bluestar who was on her last life.
No, his killer is Scourge in the Darkest Hour
For her story plot to go as she planned, yes. Erin Hunter had to kill Silverstream so that she and Graystripe's kits would be with RiverClan when Tigerstar became the joint leader of RiverClan with Leopardstar. Then Tigerstar, in his quest for pure-blood cats, could try to make Stonefur kill them and if Silverstream were still alive, she would protect her kits and she wouldn't let Tigerstar try to kill them. If Tigerstar wouldn't have tried to kill the kits, then Graystripe, Ravenpaw, and Firestar wouldn't have rescued the kits, and the plot of the story would fall apart. So, yes. Erin Hunter did have to kill Silverstream.
Peter Sorge has written: 'Peter Sorge' -- subject(s): Exhibitions
Yes, he does. Tigerstar orders Stonefur to kill Graystripe's kits and Stonefur refuses, then Tigerstar orders Darkstripe to kill him, but Darkstripe is defeated, so he gets the help of Blackfoot and they kill him. This happens in "The Darkest Hour", the last book of the first series.
Firestar is a peaceloving leader who does not think 'violence is the answer'. Tigerstar is a ruthless murderer who thinks nothing of peace and love. He is ambitious and is willing to kill to get what he wants.