The only person she ever kills besides aliens is Mystique and that is presented more as an accident similar to her causing the death of her mother. The cops she attacked were only stated to be injured.
I think the film’s statement is the same as Days of Future Past based on the opening narrations being near identical.
Originally Posted by Charles XavierJean replaced Mystique as the person he had to save from going down a dark path.Originally Posted by Jean Grey