One no one has mentioned here, but excluding others. People can cause so much pain to others by excluding them based on what they look like and what they like. I don’t think I need to explain that any further.
There's a difference between a people and a nation. Nations are abstract and arbitrary inventions. No one has any obligation to be "loyal" to theirs. What we call a nation's interests is really the interests of the ruling elite that more often than not see the citizens as livestock or an expendable resource that they can use and abuse if it's more profitable or advantageous. I can't believe you think "supporting your homeland's enemies" is worse than rape or murder.In my opinion, I’m going with treachery (also known as betrayal). It’s fine if you have to leave your family or state (or country) to fulfill your dreams or live in an optimal location. It’s also fine to break from your family or friends if they’re the ones doing something evil. But to abandon your family or support your homeland’s enemies for your self-interests is the lowest thing you can do. Sacrificing your family, friends, or your nation to get what you want is very immoral, and dangerous.