User blog comment:Eobard95/How Savitar could be future Barry/@comment-27700324-20170310052825/@comment-26624146-20170310070921

Yea Barry wouldn't kill Iris, that is not in question but if a future version of himself who lost his Iris ruptured the timeline trying to save her only to create an alternate version of himself who does have Iris, a different Iris, while future Barry is still without the one he lost while another version of himself is living the life he craved that would make him a bit resentful as his Iris is now forever lost to him. Plus the stone could have driven him insane after gaining it's powers.