Its not just a medical diagnosis of what reshaphes your past, its also growing.

Seeing why a person is who they are, their cirumstances, their unability to grow, etc.

I don't hate people just because they are 'bad'. I ignore them instead or try to interact with them as far as I can enjoy it.

You know that one weird/bad/off/agressive/whatever parent or familiy member or friend or neighbour.

Self reflection is a skill, change is hard, acceptance is hard and even with all of this: world views differe for different reasons.

Dementia in this case might be a lot easier to 'grasp' than "Oh mother had a bad upringing and no friends telling her what good/bad is" or whatever it is.