Ethnically cleansed in Nakba? You mean when Arab countries declared war on Israel and then lost?
Non-violent protests? You mean using molotov cocktails, rifles, and grenades?
You're describing effects but ignoring the causes.
Yes, Nakba was an ethnic cleansing: https://en.wikipedia.org/wiki/Nakba
Yes, they sniped peaceful protesters at the March of Return: https://en.wikipedia.org/wiki/2018%E2%80%932019_Gaza_border_...
I encourage people to read these links for themselves.