Today it’s likely changed for the majority of Americans, true.
But I had all favorable dealings with people who were from Pakistan and of course from India as well here in the USA, so I never had an unfavorable opinion of Pakistan generally.
I always saw Pakistan as an unfortunate situation where brother was pitted against brother (with India).
But my mother (who is American, very white and very Scottish looking) was married to an Egyptian man in the early 1980s for a few years when I was 12-14 yrs old. My last name almost became Bekheet.
30 years later, she still uses Bekheet.
So, I had exposure to other cultures at a young age and I don’t think the stereotypes ever formed for me. I look at this map and it surprises me that people actually believe the world is like this.
You make a good point about the US and Pakistan being friendly prior to 2001. I judge the middle east based upon how it was prior to 2001, not after 2001, which to me is a strange anomaly on the world stage that will eventually correct itself… hopefully, and some kind of status quo returns.