Why did anakin skywaker become evil?

Anakin had a vision that his wife, Padme, would die in childbirth. So his friend Palpatine, revealed himself to be a Sith lord. Palpatine told Anakin that if he joins the Sith, he would be able to save Padme. So Anakin joined and killed all the Jedi, just as Darth Sidious/Palpatine instructed. Anakin killed so many people, that he became evil.

Partially Right, anakin did have a vision that padme would die in childbirth. Emperor Palpantine Told Anakin He Could Teach him a power that could stop people he loved most from dying and he wanted that for padme(for her not to die.) But It could only but learned in the form of a sith.So Anakin Became a sith lord.

What happend was anakin did have vision that padme was gonna die talked to palpatine when the palpatine later revealed himself as a sith anakin told mace windu (jedi counsil) who went to arrest palpatine. then palpatine killed everyone who went to arrest him except for mace windu who was about to kill him when anakin showed up and said no dont kill him he needs to be arrested i need him blah blah ect. then mace says he is to dangerous to be alive and takes a swing to kill palpatine when anikan cuts off mace's arm palpatine uses his force lightning to kill him then says to anakin that the jedi have gone against the republic and tells anakin to go to the temple and kill all the "evil" jedi. while anakin is doing this he calls up the storm troopers and says " the time has come. exicute order 66" order 66 was an order instilled by the kaminos that was orderd when the jedi turned against the republic. and that order tells clones to kill all jedi. this was the begining of the jedi purge so basically anakan

had a lot on his plate he was confused and tricked by palpatine hoped i helped. Please if you have anymore questions feel free to e-mail me at piemart_piecat_piereen@Yahoo.com