Because South Africa did. And before that the US did. Eventually Israel will too, it's just a question of how much blood their extremists and racists will exact before they yield to justice.
Suppose an American president had said "I've killed lots of blacks in my life and there's no problem with that". Or that the US largest newspaper published essays arguing that America would have failed if it ever got a black president. Or that congress enacted laws saying that the right to national self-determination in the US is unique to white people. If the US was like that would you say that blacks had equal rights?
https://web.archive.org/web/20210201162924/https://www.jpost...
https://www.vox.com/world/2018/7/31/17623978/israel-jewish-n...