Because they care if we follow their protocol and decorum.
We don’t care if they follow ours. That is the distinction.
The difference is if Obama met the Queen of England and started spouting off Ebonics, she would likely walk out of the room.
“We don’t care if they follow ours. That is the distinction.”
Then caring is proof that they judge themselves superior. Which is a fine reason not to indulge them. Especially since they often need things from us. Money, defense, etc.