"The Olivet discourse was directed to a specific group of hearers. Those who heard and heeded headed for the hills in 70 AD, escaping with their lives, alone. They are the "we" who Jesus addressed, not us."
Exactly! As was the "love thy neighbor" not meant to love everyone, but only to love YOUR people. In Jesus times He meant the Jews to love the Jews.
Does that mean the parable of the Good Samaritan was just a joke?
If that were truly His intent, it was not expressed specifically in that discourse and that discourse was addressed to a multitude in Jerusalem - a city where many Gentiles lived.