Board Thread:The Flash discussions/@comment-5441128-20170524174933/@comment-26537965-20170716220911

Dragonfly82 wrote: If he creates a new timeline and undo and creates a other timeline were things are more twisted. Will you use the same fact to defend him?

The Legends can then start and hunt for the Flash. They are protectors of History. Well their leader (Sara) has almost made the same mistake, so  she has no right to judge him. Jax also tried to save his father by warning him in Season 1.