Hatred for one's homeland

Once on Twitter, I came across a tweet by an Iranian woman that said: "On the way to the Imam Khomeini International Airport, I got out of the taxi, picked up a handful of soil from the side of the road, and put it in my suitcase so that when I arrive in the US, I can wake up every morning and spit on it."

To this moment, I cannot comprehend the degree of anger and hatred that the Iranian woman harbored towards her homeland. I don't understand why that handful of soil, which is the last remaining connection to her birthplace, is met with such hatred and venom.

When I then place this with the words of my Iranian acquaintance who not only has no qualms about the aggression of the US and Israel against his homeland but is actually rejoicing in it, I'm still left baffled. Where does this immense hatred and spite come from? What is the source? 

I have never seen any Hazara diaspora who, despite enduring decades of oppression and cruelty at the hands of Pashtuns, has expressed hatred toward their homeland.