I can relate somewhat similar situation. Where I was raised, everyone was Bralvi Muslim. There was only one Christian family of British origin. They lived in a very old big house. They couple had one boy. His only friends were me and my brother. We were the only one to visit him. Nobody would invite him to any sports or social event.
Later they got an opportunity and settled in UK. Since then, I don't know what happened to them.
Right now I live in a place where we have little to no Christians. But there is a large community of Christians not far from us. People in my area still don't like Christians that much but I have seen that Muslims living in those Christian majority areas don't have the same kind of attitude toward them.
But then again, where I was raised, people also had a little negative attitude toward Muslims of other sects. I visited that area some years ago and found that not everyone is Bralvi Muslim there. Many families have now converted to Shia Islam and Deoband Islam.
In short, some places are worst and some are not that bad. It all depends on where you live. But still, there is somewhat dislike for non-Muslims in Pakistan.