It's possible for sure
I'm sure if you were told in detail of the horrific crimes of some rapist murderer who abused and killed hundreds of children including some of your own family - even if you did not know them personally - you would likely hate them, and quite genuinely so
This obsession with never feeling "negative" emotions (like hatred or shame) is kind of creepy, some people want to sanitise all human interaction this way but it just doesn't work to make us better people, or really even make sense, it's fake