Premanand Maharaj Ji
Why do hatred and jealousy arise, and how can they go?
See God in every heart
Attachment and hatred arise when we see the human being and not the Paramatma (Supreme Soul). If you actually experience God in every heart, insult, praise and honour all fall away.
When does attachment and hatred arise? When we see only the human being and do not see the Paramatma. As you said, the one Paramatma sits in everyone's heart.