Zionism is a religious and political movement to reclaim Palestine for the Israeli people and views that land as inherently belonging to Jewish people because God said so.

That belief alone is not enough to call it a genocidal ideology. However, because Zionists overwhelmingly "reclaim" the land by terrorizing the current inhabitants, it's not that much of a stretch.

It is also inherently nationalistic and Zionists are inherently colonizers. It's not racist to say that because it's an ideology, and a harmful one.

Just like I'd call all Westboro Baptists bigots. And I'd call any far-right group fascists. The Zionist ideology is the exact same