Herzel is mentionned as the spiritual father of Israel in israel's "declaration of independence". Herzl talked about displacing arabs and never let them back.

Herzl’s Diary, 12 June 1895

The property owners will come over to our side. According to my conception, the majority of the local population will have to be transferred elsewhere.

We shall try to spirit the penniless population across the border by procuring employment for it in the transit countries, while denying it any employment in our own country. - Herzl’s Diary, 12 June 1895

Both the process of expropriation and the removal of the poor must be carried out discreetly and circumspectly - Herzl’s Diary, 12 June 1895

Now in practice. The creation of israel couldn't happen without ethenic cleansing because jews only had 9% of the land and the lands was dispersed.

Zionism is a supermasist ideology that believe jews no matter if their most direct ancestors has more right ro the land than the local people that include muslims and christians.

Saying that israel can only be a jewish state is dangerous. It would mean of arabs ever outpace jews in population they would have to remove them too. Many israeli think the arab population is a long term threat

The Palestinian citizens of Israel are a time bomb. Their slide into complete Palestinization has made them an emissary of the enemy that is among us. They are a potential fifth column - Benny Morris