That's the goal of all paths of Yoga (Karma/devotion/meditation/wisdom)
The above isn't something theoretical jargon – I know at least one individual living at this moment who has reached to that state by following the meditation path of yoga [0].
You may wish to read yoga sutras on swamij.com to see for yourself the profound insights of mind and its working expounded by the author Patanjali.
For instance, Yoga sutras starts with:The goal of Yoga is to regulate the modifications (tendencies) of mind,So the seer rests in its true nature.
The true nature of our consciousness (the seer) is existence-knowledge-bliss.
Hating someone or a group/race of beings is just a negative tendancy which has been adopted, often unconsciously, due to certain experiences in life. With stillness of meditation you can invite such thoughts witness them and remove clinging of mind toward them [0]. All methodologically.
Since you give me life recommendations and profound wisdom, here's my advice offered in return: forget about all this stuff and just live your life as an ordinary human on earth.
Through this simple practice of letting go of attachment to religious hope, you can find a sweet kind of freedom and simplicity—maybe even some kind of wisdom!
Good luck!
Somebody on HN pointed out that "an ordinary" human is probably not what you think it is [0].
[0] http://www.econstor.eu/bitstream/10419/43616/1/626014360.pdf
For one, I like reading about "weird" stuff, in reasonable quantities.