You should maybe bone up a bit on your Zionism before you go on the lecture circuit about it.
There has always been left wing Zionism and right wing Zionism. The left wingers have been in favor or treating Palestinians as equals, from the get go and giving them a state, the right wingers not so much.
It turned out that the right wingers have mostly been the ones in power so that's why you have the impression you have.
The term Zionism encompasses more than one ideology about the form the relationship with the neighbors takes..