What if people started to say, "USA has no right to exist, all Americans are pigs,"?

Exactly. Sixty years after the Mexican American war, the world in general and Mexico in particular had figured out that Texas, California, New Mexico, Arizona, etc. were not coming back. That is the exact ogy. By 60 years after the founding of Israel, the Palestinians should not be sitting in refugee camps waiting their lives away for their old land back, they should be working on building their lives and looking forward to when Tulkarem is going to play that hated Haifa team in soccer. But I'm naive I guess.