The wiki article DarkGamer posted, in the comment you're replying to, mentions Jewish land purchases predating the Balfour Declaration. I would recommend reading the article. It paints a more nuanced picture.
(For the record, I think Israel's current government is run by fascists and that what's been happening in the West Bank and Gaza amounts to ethnic cleansing, although that doesn't stop some people in the fediverse from insinuating I'm a zionist shill when I suggest Hamas or Iran aren't the good guys either).