Death is the final answer for evry hatred

In my neighborhood There is one dairy called Sri Ram Dairy.I used to take one Amol milk packet from them. I used to find to one old guy sitting in the dairy. He was annoying because he would ask for change without change he would refuse to give anything and he never talked nicely as other shopkeepers do for me he was lethargic. I had encountered situation when i had to take Amol from the other shops.So taking lesson from those incident I decided i would not take anything from that shop.Yesterday I had gone to buy ,as usual i ignored that shop, he was sitting there (I knew that old person also hated me because last time i had change in my pocket still i returned from his shop showing my visible annoyance and took the milk packet from other shop beside his shop). Today my cook told that old person has died due to heart attack, remorsefully I felt sympathy and thought why we need to hate any person when we don't know when we will be gone from this world. I hope that i won't hate anybody anymore.