Actually, while there were moderate zionists that opted for co-existence with Arabs, there were a marginalized voice even 120 years ago. I've read many transcripts of leading zionists from the early days of zionism and all the influencial voices called for an expulsion of Arabs from the region. The way things changed after WWII is that instead of being marginalized, radical left zionist jews were killed by the prevailing zionist status quo. Hence the ideology is inherently racist for it even silences those voices within it that try to modify it. Chomsky not only left zionist circles, he denounced Zionism. Same thing with Hannah Arednt.
******************************************** "If you think you're too small to make a difference, try sleeping in a closed room with a mosquito."